remove old dep

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diff --git a/markdown3.py b/markdown3.py
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--- a/markdown3.py
+++ /dev/null
@@ -1,3852 +0,0 @@
-#!/usr/bin/env python
-# Copyright (c) 2012 Trent Mick.
-# Copyright (c) 2007-2008 ActiveState Corp.
-# License: MIT (http://www.opensource.org/licenses/mit-license.php)
-
-r"""A fast and complete Python implementation of Markdown.
-
-[from http://daringfireball.net/projects/markdown/]
-> Markdown is a text-to-HTML filter; it translates an easy-to-read /
-> easy-to-write structured text format into HTML.  Markdown's text
-> format is most similar to that of plain text email, and supports
-> features such as headers, *emphasis*, code blocks, blockquotes, and
-> links.
->
-> Markdown's syntax is designed not as a generic markup language, but
-> specifically to serve as a front-end to (X)HTML. You can use span-level
-> HTML tags anywhere in a Markdown document, and you can use block level
-> HTML tags (like <div> and <table> as well).
-
-Module usage:
-
-    >>> import markdown2
-    >>> markdown2.markdown("*boo!*")  # or use `html = markdown_path(PATH)`
-    u'<p><em>boo!</em></p>\n'
-
-    >>> markdowner = Markdown()
-    >>> markdowner.convert("*boo!*")
-    u'<p><em>boo!</em></p>\n'
-    >>> markdowner.convert("**boom!**")
-    u'<p><strong>boom!</strong></p>\n'
-
-This implementation of Markdown implements the full "core" syntax plus a
-number of extras (e.g., code syntax coloring, footnotes) as described on
-<https://github.com/trentm/python-markdown2/wiki/Extras>.
-"""
-
-cmdln_desc = """A fast and complete Python implementation of Markdown, a
-text-to-HTML conversion tool for web writers.
-
-Supported extra syntax options (see -x|--extras option below and
-see <https://github.com/trentm/python-markdown2/wiki/Extras> for details):
-
-* admonitions: Enable parsing of RST admonitions.
-* breaks: Control where hard breaks are inserted in the markdown.
-  Options include:
-  - on_newline: Replace single new line characters with <br> when True
-  - on_backslash: Replace backslashes at the end of a line with <br>
-* break-on-newline: Alias for the on_newline option in the breaks extra.
-* code-friendly: Disable _ and __ for em and strong.
-* cuddled-lists: Allow lists to be cuddled to the preceding paragraph.
-* fenced-code-blocks: Allows a code block to not have to be indented
-  by fencing it with '```' on a line before and after. Based on
-  <http://github.github.com/github-flavored-markdown/> with support for
-  syntax highlighting.
-* footnotes: Support footnotes as in use on daringfireball.net and
-  implemented in other Markdown processors (tho not in Markdown.pl v1.0.1).
-* header-ids: Adds "id" attributes to headers. The id value is a slug of
-  the header text.
-* highlightjs-lang: Allows specifying the language which used for syntax
-  highlighting when using fenced-code-blocks and highlightjs.
-* html-classes: Takes a dict mapping html tag names (lowercase) to a
-  string to use for a "class" tag attribute. Currently only supports "img",
-  "table", "thead", "pre", "code", "ul" and "ol" tags. Add an issue if you require
-  this for other tags.
-* link-patterns: Auto-link given regex patterns in text (e.g. bug number
-  references, revision number references).
-* markdown-in-html: Allow the use of `markdown="1"` in a block HTML tag to
-  have markdown processing be done on its contents. Similar to
-  <http://michelf.com/projects/php-markdown/extra/#markdown-attr> but with
-  some limitations.
-* metadata: Extract metadata from a leading '---'-fenced block.
-  See <https://github.com/trentm/python-markdown2/issues/77> for details.
-* middle-word-em: Allows or disallows emphasis syntax in the middle of words,
-  defaulting to allow. Disabling this means that `this_text_here` will not be
-  converted to `this<em>text</em>here`.
-* nofollow: Add `rel="nofollow"` to add `<a>` tags with an href. See
-  <http://en.wikipedia.org/wiki/Nofollow>.
-* numbering: Support of generic counters.  Non standard extension to
-  allow sequential numbering of figures, tables, equations, exhibits etc.
-* pyshell: Treats unindented Python interactive shell sessions as <code>
-  blocks.
-* smarty-pants: Replaces ' and " with curly quotation marks or curly
-  apostrophes.  Replaces --, ---, ..., and . . . with en dashes, em dashes,
-  and ellipses.
-* spoiler: A special kind of blockquote commonly hidden behind a
-  click on SO. Syntax per <http://meta.stackexchange.com/a/72878>.
-* strike: text inside of double tilde is ~~strikethrough~~
-* tag-friendly: Requires atx style headers to have a space between the # and
-  the header text. Useful for applications that require twitter style tags to
-  pass through the parser.
-* tables: Tables using the same format as GFM
-  <https://help.github.com/articles/github-flavored-markdown#tables> and
-  PHP-Markdown Extra <https://michelf.ca/projects/php-markdown/extra/#table>.
-* toc: The returned HTML string gets a new "toc_html" attribute which is
-  a Table of Contents for the document. (experimental)
-* use-file-vars: Look for an Emacs-style markdown-extras file variable to turn
-  on Extras.
-* wiki-tables: Google Code Wiki-style tables. See
-  <http://code.google.com/p/support/wiki/WikiSyntax#Tables>.
-* wavedrom: Support for generating Wavedrom digital timing diagrams
-* xml: Passes one-liner processing instructions and namespaced XML tags.
-"""
-
-# Dev Notes:
-# - Python's regex syntax doesn't have '\z', so I'm using '\Z'. I'm
-#   not yet sure if there implications with this. Compare 'pydoc sre'
-#   and 'perldoc perlre'.
-
-__version_info__ = (2, 4, 14)
-__version__ = '.'.join(map(str, __version_info__))
-__author__ = "Trent Mick"
-
-import argparse
-import codecs
-import logging
-import re
-import sys
-from collections import defaultdict, OrderedDict
-from abc import ABC, abstractmethod
-import functools
-from hashlib import sha256
-from random import randint, random
-from typing import Dict, List, Optional, Tuple, Union
-from enum import IntEnum, auto
-
-if sys.version_info[1] < 9:
-    from typing import Iterable
-else:
-    from collections.abc import Iterable
-
-# ---- globals
-
-DEBUG = False
-log = logging.getLogger("markdown")
-
-DEFAULT_TAB_WIDTH = 4
-
-
-SECRET_SALT = bytes(randint(0, 1000000))
-# MD5 function was previously used for this; the "md5" prefix was kept for
-# backwards compatibility.
-def _hash_text(s):
-    return 'md5-' + sha256(SECRET_SALT + s.encode("utf-8")).hexdigest()[32:]
-
-# Table of hash values for escaped characters:
-g_escape_table = dict([(ch, _hash_text(ch))
-    for ch in '\\`*_{}[]()>#+-.!'])
-
-# Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
-#   http://bumppo.net/projects/amputator/
-_AMPERSAND_RE = re.compile(r'&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)')
-
-
-# ---- exceptions
-class MarkdownError(Exception):
-    pass
-
-
-# ---- public api
-
-def markdown_path(path, encoding="utf-8",
-                  html4tags=False, tab_width=DEFAULT_TAB_WIDTH,
-                  safe_mode=None, extras=None, link_patterns=None,
-                  footnote_title=None, footnote_return_symbol=None,
-                  use_file_vars=False):
-    fp = codecs.open(path, 'r', encoding)
-    text = fp.read()
-    fp.close()
-    return Markdown(html4tags=html4tags, tab_width=tab_width,
-                    safe_mode=safe_mode, extras=extras,
-                    link_patterns=link_patterns,
-                    footnote_title=footnote_title,
-                    footnote_return_symbol=footnote_return_symbol,
-                    use_file_vars=use_file_vars).convert(text)
-
-
-def markdown(text, html4tags=False, tab_width=DEFAULT_TAB_WIDTH,
-             safe_mode=None, extras=None, link_patterns=None,
-             footnote_title=None, footnote_return_symbol=None,
-             use_file_vars=False, cli=False):
-    return Markdown(html4tags=html4tags, tab_width=tab_width,
-                    safe_mode=safe_mode, extras=extras,
-                    link_patterns=link_patterns,
-                    footnote_title=footnote_title,
-                    footnote_return_symbol=footnote_return_symbol,
-                    use_file_vars=use_file_vars, cli=cli).convert(text)
-
-
-class Stage(IntEnum):
-    PREPROCESS = auto()
-    HASH_HTML = auto()
-    LINK_DEFS = auto()
-
-    BLOCK_GAMUT = auto()
-    HEADERS = auto()
-    LISTS = auto()
-    CODE_BLOCKS = auto()
-    BLOCK_QUOTES = auto()
-    PARAGRAPHS = auto()
-
-    SPAN_GAMUT = auto()
-    CODE_SPANS = auto()
-    ESCAPE_SPECIAL = auto()
-    LINKS = auto()  # and auto links
-    ITALIC_AND_BOLD = auto()
-
-    POSTPROCESS = auto()
-    UNHASH_HTML = auto()
-
-
-def mark_stage(stage: Stage):
-    '''
-    Decorator that handles executing relevant `Extra`s before and after this `Stage` executes.
-    '''
-    def wrapper(func):
-        @functools.wraps(func)
-        def inner(md: 'Markdown', text, *args, **kwargs):
-            md.stage = stage
-            # set "order" prop so extras can tell if they're being invoked before/after the stage
-            md.order = stage - 0.5
-
-            if stage in Extra._exec_order:
-                for klass in Extra._exec_order[stage][0]:
-                    if klass.name not in md.extra_classes:
-                        continue
-                    extra = md.extra_classes[klass.name]
-                    if extra.test(text):
-                        text = extra.run(text)
-
-            md.order = stage
-            text = func(md, text, *args, **kwargs)
-            md.order = stage + 0.5
-
-            if stage in Extra._exec_order:
-                for klass in Extra._exec_order[stage][1]:
-                    if klass.name not in md.extra_classes:
-                        continue
-                    extra = md.extra_classes[klass.name]
-                    if extra.test(text):
-                        text = extra.run(text)
-
-            return text
-
-        return inner
-
-    return wrapper
-
-
-class Markdown(object):
-    # The dict of "extras" to enable in processing -- a mapping of
-    # extra name to argument for the extra. Most extras do not have an
-    # argument, in which case the value is None.
-    #
-    # This can be set via (a) subclassing and (b) the constructor
-    # "extras" argument.
-    extras = None
-    # dict of `Extra` names and associated class instances, populated during _setup_extras
-    extra_classes = None
-
-    urls = None
-    titles = None
-    html_blocks = None
-    html_spans = None
-    html_removed_text = "{(#HTML#)}"  # placeholder removed text that does not trigger bold
-    html_removed_text_compat = "[HTML_REMOVED]"  # for compat with markdown.py
-
-    _toc = None
-
-    # Used to track when we're inside an ordered or unordered list
-    # (see _ProcessListItems() for details):
-    list_level = 0
-
-    stage: Stage
-    '''Current "stage" of markdown conversion taking place'''
-    order: int
-    '''
-    Same as `Stage` but will be +/- 0.5 of the value of `Stage`.
-    This allows extras to check if they are running before or after a particular stage
-    with `if md.order < md.stage`.
-    '''
-
-    _ws_only_line_re = re.compile(r"^[ \t]+$", re.M)
-
-    def __init__(self, html4tags=False, tab_width=4, safe_mode=None,
-                 extras=None, link_patterns=None,
-                 footnote_title=None, footnote_return_symbol=None,
-                 use_file_vars=False, cli=False):
-        if html4tags:
-            self.empty_element_suffix = ">"
-        else:
-            self.empty_element_suffix = " />"
-        self.tab_width = tab_width
-        self.tab = tab_width * " "
-
-        # For compatibility with earlier markdown2.py and with
-        # markdown.py's safe_mode being a boolean,
-        #   safe_mode == True -> "replace"
-        if safe_mode is True:
-            self.safe_mode = "replace"
-        else:
-            self.safe_mode = safe_mode
-
-        # Massaging and building the "extras" info.
-        if self.extras is None:
-            self.extras = {}
-        elif not isinstance(self.extras, dict):
-            self.extras = dict([(e, None) for e in self.extras])
-        if extras:
-            if not isinstance(extras, dict):
-                extras = dict([(e, None) for e in extras])
-            self.extras.update(extras)
-        assert isinstance(self.extras, dict)
-
-        if "toc" in self.extras:
-            if "header-ids" not in self.extras:
-                self.extras["header-ids"] = None   # "toc" implies "header-ids"
-
-            if self.extras["toc"] is None:
-                self._toc_depth = 6
-            else:
-                self._toc_depth = self.extras["toc"].get("depth", 6)
-
-        if 'header-ids' in self.extras:
-            if not isinstance(self.extras['header-ids'], dict):
-                self.extras['header-ids'] = {
-                    'mixed': False,
-                    'prefix': self.extras['header-ids'],
-                    'reset-count': True
-                }
-
-        if 'break-on-newline' in self.extras:
-            self.extras.setdefault('breaks', {})
-            self.extras['breaks']['on_newline'] = True
-
-        if 'link-patterns' in self.extras:
-            # allow link patterns via extras dict without kwarg explicitly set
-            link_patterns = link_patterns or extras['link-patterns']
-            if link_patterns is None:
-                # if you have specified that the link-patterns extra SHOULD
-                # be used (via self.extras) but you haven't provided anything
-                # via the link_patterns argument then an error is raised
-                raise MarkdownError("If the 'link-patterns' extra is used, an argument for 'link_patterns' is required")
-            self.extras['link-patterns'] = link_patterns
-
-        self._instance_extras = self.extras.copy()
-        self.link_patterns = link_patterns
-        self.footnote_title = footnote_title
-        self.footnote_return_symbol = footnote_return_symbol
-        self.use_file_vars = use_file_vars
-        self._outdent_re = re.compile(r'^(\t|[ ]{1,%d})' % tab_width, re.M)
-        self.cli = cli
-
-        self._escape_table = g_escape_table.copy()
-        self._code_table = {}
-        if "smarty-pants" in self.extras:
-            self._escape_table['"'] = _hash_text('"')
-            self._escape_table["'"] = _hash_text("'")
-
-    def reset(self):
-        self.urls = {}
-        self.titles = {}
-        self.html_blocks = {}
-        self.html_spans = {}
-        self.list_level = 0
-        self.extras = self._instance_extras.copy()
-        self._setup_extras()
-        self._toc = None
-
-    def _setup_extras(self):
-        if "footnotes" in self.extras:
-            # order of insertion matters for footnotes. Use ordered dict for Python < 3.7
-            # https://docs.python.org/3/whatsnew/3.7.html#summary-release-highlights
-            self.footnotes = OrderedDict()
-            self.footnote_ids = []
-        if "header-ids" in self.extras:
-            if not hasattr(self, '_count_from_header_id') or self.extras['header-ids'].get('reset-count', False):
-                self._count_from_header_id = defaultdict(int)
-        if "metadata" in self.extras:
-            self.metadata = {}
-
-        self.extra_classes = {}
-        for name, klass in Extra._registry.items():
-            if name not in self.extras:
-                #print(name, "not in", self.extras)
-                continue
-            self.extra_classes[name] = klass(self, (self.extras.get(name, {})))
-
-    # Per <https://developer.mozilla.org/en-US/docs/HTML/Element/a> "rel"
-    # should only be used in <a> tags with an "href" attribute.
-
-    # Opens the linked document in a new window or tab
-    # should only used in <a> tags with an "href" attribute.
-    # same with _a_nofollow
-    _a_nofollow_or_blank_links = re.compile(r"""
-        <(a)
-        (
-            [^>]*
-            href=   # href is required
-            ['"]?   # HTML5 attribute values do not have to be quoted
-            [^#'"]  # We don't want to match href values that start with # (like footnotes)
-        )
-        """,
-        re.IGNORECASE | re.VERBOSE
-    )
-
-    def convert(self, text):
-        """Convert the given text."""
-        # Main function. The order in which other subs are called here is
-        # essential. Link and image substitutions need to happen before
-        # _EscapeSpecialChars(), so that any *'s or _'s in the <a>
-        # and <img> tags get encoded.
-
-        # Clear the global hashes. If we don't clear these, you get conflicts
-        # from other articles when generating a page which contains more than
-        # one article (e.g. an index page that shows the N most recent
-        # articles):
-        self.reset()
-
-        if not isinstance(text, str):
-            # TODO: perhaps shouldn't presume UTF-8 for string input?
-            text = str(text, 'utf-8')
-
-        if self.use_file_vars:
-            # Look for emacs-style file variable hints.
-            text = self._emacs_oneliner_vars_pat.sub(self._emacs_vars_oneliner_sub, text)
-            emacs_vars = self._get_emacs_vars(text)
-            if "markdown-extras" in emacs_vars:
-                splitter = re.compile("[ ,]+")
-                for e in splitter.split(emacs_vars["markdown-extras"]):
-                    if '=' in e:
-                        ename, earg = e.split('=', 1)
-                        try:
-                            earg = int(earg)
-                        except ValueError:
-                            pass
-                    else:
-                        ename, earg = e, None
-                    self.extras[ename] = earg
-
-            self._setup_extras()
-
-        # Standardize line endings:
-        text = text.replace("\r\n", "\n")
-        text = text.replace("\r", "\n")
-
-        # Make sure $text ends with a couple of newlines:
-        text += "\n\n"
-
-        # Convert all tabs to spaces.
-        text = self._detab(text)
-
-        # Strip any lines consisting only of spaces and tabs.
-        # This makes subsequent regexen easier to write, because we can
-        # match consecutive blank lines with /\n+/ instead of something
-        # contorted like /[ \t]*\n+/ .
-        text = self._ws_only_line_re.sub("", text)
-
-        # strip metadata from head and extract
-        if "metadata" in self.extras:
-            text = self._extract_metadata(text)
-
-        text = self.preprocess(text)
-
-        if self.safe_mode:
-            text = self._hash_html_spans(text)
-
-        # Turn block-level HTML blocks into hash entries
-        text = self._hash_html_blocks(text, raw=True)
-
-        # Strip link definitions, store in hashes.
-        if "footnotes" in self.extras:
-            # Must do footnotes first because an unlucky footnote defn
-            # looks like a link defn:
-            #   [^4]: this "looks like a link defn"
-            text = self._strip_footnote_definitions(text)
-        text = self._strip_link_definitions(text)
-
-        text = self._run_block_gamut(text)
-
-        if "footnotes" in self.extras:
-            text = self._add_footnotes(text)
-
-        text = self.postprocess(text)
-
-        text = self._unescape_special_chars(text)
-
-        if self.safe_mode:
-            text = self._unhash_html_spans(text)
-            # return the removed text warning to its markdown.py compatible form
-            text = text.replace(self.html_removed_text, self.html_removed_text_compat)
-
-        do_target_blank_links = "target-blank-links" in self.extras
-        do_nofollow_links = "nofollow" in self.extras
-
-        if do_target_blank_links and do_nofollow_links:
-            text = self._a_nofollow_or_blank_links.sub(r'<\1 rel="nofollow noopener" target="_blank"\2', text)
-        elif do_target_blank_links:
-            text = self._a_nofollow_or_blank_links.sub(r'<\1 rel="noopener" target="_blank"\2', text)
-        elif do_nofollow_links:
-            text = self._a_nofollow_or_blank_links.sub(r'<\1 rel="nofollow"\2', text)
-
-        if "toc" in self.extras and self._toc:
-            if self.extras['header-ids'].get('mixed'):
-                # TOC will only be out of order if mixed headers is enabled
-                def toc_sort(entry):
-                    '''Sort the TOC by order of appearance in text'''
-                    return re.search(
-                        # header tag, any attrs, the ID, any attrs, the text, close tag
-                        r'^<(h%d).*?id=(["\'])%s\2.*>%s</\1>$' % (entry[0], entry[1], re.escape(entry[2])),
-                        text, re.M
-                    ).start()
-
-                self._toc.sort(key=toc_sort)
-            self._toc_html = calculate_toc_html(self._toc)
-
-            # Prepend toc html to output
-            if self.cli or (self.extras['toc'] is not None and self.extras['toc'].get('prepend', False)):
-                text = '{}\n{}'.format(self._toc_html, text)
-
-        text += "\n"
-
-        # Attach attrs to output
-        rv = UnicodeWithAttrs(text)
-
-        if "toc" in self.extras and self._toc:
-            rv.toc_html = self._toc_html
-
-        if "metadata" in self.extras:
-            rv.metadata = self.metadata
-        return rv
-
-    @mark_stage(Stage.POSTPROCESS)
-    def postprocess(self, text):
-        """A hook for subclasses to do some postprocessing of the html, if
-        desired. This is called before unescaping of special chars and
-        unhashing of raw HTML spans.
-        """
-        return text
-
-    @mark_stage(Stage.PREPROCESS)
-    def preprocess(self, text):
-        """A hook for subclasses to do some preprocessing of the Markdown, if
-        desired. This is called after basic formatting of the text, but prior
-        to any extras, safe mode, etc. processing.
-        """
-        return text
-
-    # Is metadata if the content starts with optional '---'-fenced `key: value`
-    # pairs. E.g. (indented for presentation):
-    #   ---
-    #   foo: bar
-    #   another-var: blah blah
-    #   ---
-    #   # header
-    # or:
-    #   foo: bar
-    #   another-var: blah blah
-    #
-    #   # header
-    _meta_data_pattern = re.compile(r'''
-        ^{0}(  # optional opening fence
-            (?:
-                {1}:(?:\n+[ \t]+.*)+  # indented lists
-            )|(?:
-                (?:{1}:\s+>(?:\n\s+.*)+?)  # multiline long descriptions
-                (?=\n{1}:\s*.*\n|\s*\Z)  # match up until the start of the next key:value definition or the end of the input text
-            )|(?:
-                {1}:(?! >).*\n?  # simple key:value pair, leading spaces allowed
-            )
-        ){0}  # optional closing fence
-        '''.format(r'(?:---[\ \t]*\n)?', r'[\S \t]*\w[\S \t]*\s*'), re.MULTILINE | re.VERBOSE
-    )
-
-    _key_val_list_pat = re.compile(
-        r"^-(?:[ \t]*([^\n]*)(?:[ \t]*[:-][ \t]*(\S+))?)(?:\n((?:[ \t]+[^\n]+\n?)+))?",
-        re.MULTILINE,
-    )
-    _key_val_dict_pat = re.compile(
-        r"^([^:\n]+)[ \t]*:[ \t]*([^\n]*)(?:((?:\n[ \t]+[^\n]+)+))?", re.MULTILINE
-    )  # grp0: key, grp1: value, grp2: multiline value
-    _meta_data_fence_pattern = re.compile(r'^---[\ \t]*\n', re.MULTILINE)
-    _meta_data_newline = re.compile("^\n", re.MULTILINE)
-
-    def _extract_metadata(self, text):
-        if text.startswith("---"):
-            fence_splits = re.split(self._meta_data_fence_pattern, text, maxsplit=2)
-            metadata_content = fence_splits[1]
-            match = re.findall(self._meta_data_pattern, metadata_content)
-            if not match:
-                return text
-            tail = fence_splits[2]
-        else:
-            metadata_split = re.split(self._meta_data_newline, text, maxsplit=1)
-            metadata_content = metadata_split[0]
-            match = re.findall(self._meta_data_pattern, metadata_content)
-            if not match:
-                return text
-            tail = metadata_split[1]
-
-        def parse_structured_value(value):
-            vs = value.lstrip()
-            vs = value.replace(v[: len(value) - len(vs)], "\n")[1:]
-
-            # List
-            if vs.startswith("-"):
-                r = []
-                for match in re.findall(self._key_val_list_pat, vs):
-                    if match[0] and not match[1] and not match[2]:
-                        r.append(match[0].strip())
-                    elif match[0] == ">" and not match[1] and match[2]:
-                        r.append(match[2].strip())
-                    elif match[0] and match[1]:
-                        r.append({match[0].strip(): match[1].strip()})
-                    elif not match[0] and not match[1] and match[2]:
-                        r.append(parse_structured_value(match[2]))
-                    else:
-                        # Broken case
-                        pass
-
-                return r
-
-            # Dict
-            else:
-                return {
-                    match[0].strip(): (
-                        match[1].strip()
-                        if match[1]
-                        else parse_structured_value(match[2])
-                    )
-                    for match in re.findall(self._key_val_dict_pat, vs)
-                }
-
-        for item in match:
-
-            k, v = item.split(":", 1)
-
-            # Multiline value
-            if v[:3] == " >\n":
-                self.metadata[k.strip()] = _dedent(v[3:]).strip()
-
-            # Empty value
-            elif v == "\n":
-                self.metadata[k.strip()] = ""
-
-            # Structured value
-            elif v[0] == "\n":
-                self.metadata[k.strip()] = parse_structured_value(v)
-
-            # Simple value
-            else:
-                self.metadata[k.strip()] = v.strip()
-
-        return tail
-
-    _emacs_oneliner_vars_pat = re.compile(r"((?:<!--)?\s*-\*-)\s*(?:(\S[^\r\n]*?)([\r\n]\s*)?)?(-\*-\s*(?:-->)?)", re.UNICODE)
-    # This regular expression is intended to match blocks like this:
-    #    PREFIX Local Variables: SUFFIX
-    #    PREFIX mode: Tcl SUFFIX
-    #    PREFIX End: SUFFIX
-    # Some notes:
-    # - "[ \t]" is used instead of "\s" to specifically exclude newlines
-    # - "(\r\n|\n|\r)" is used instead of "$" because the sre engine does
-    #   not like anything other than Unix-style line terminators.
-    _emacs_local_vars_pat = re.compile(r"""^
-        (?P<prefix>(?:[^\r\n|\n|\r])*?)
-        [\ \t]*Local\ Variables:[\ \t]*
-        (?P<suffix>.*?)(?:\r\n|\n|\r)
-        (?P<content>.*?\1End:)
-        """, re.IGNORECASE | re.MULTILINE | re.DOTALL | re.VERBOSE)
-
-    def _emacs_vars_oneliner_sub(self, match):
-        if match.group(1).strip() == '-*-' and match.group(4).strip() == '-*-':
-            lead_ws = re.findall(r'^\s*', match.group(1))[0]
-            tail_ws = re.findall(r'\s*$', match.group(4))[0]
-            return '%s<!-- %s %s %s -->%s' % (lead_ws, '-*-', match.group(2).strip(), '-*-', tail_ws)
-
-        start, end = match.span()
-        return match.string[start: end]
-
-    def _get_emacs_vars(self, text):
-        """Return a dictionary of emacs-style local variables.
-
-        Parsing is done loosely according to this spec (and according to
-        some in-practice deviations from this):
-        http://www.gnu.org/software/emacs/manual/html_node/emacs/Specifying-File-Variables.html#Specifying-File-Variables
-        """
-        emacs_vars = {}
-        SIZE = pow(2, 13)  # 8kB
-
-        # Search near the start for a '-*-'-style one-liner of variables.
-        head = text[:SIZE]
-        if "-*-" in head:
-            match = self._emacs_oneliner_vars_pat.search(head)
-            if match:
-                emacs_vars_str = match.group(2)
-                assert '\n' not in emacs_vars_str
-                emacs_var_strs = [s.strip() for s in emacs_vars_str.split(';')
-                                  if s.strip()]
-                if len(emacs_var_strs) == 1 and ':' not in emacs_var_strs[0]:
-                    # While not in the spec, this form is allowed by emacs:
-                    #   -*- Tcl -*-
-                    # where the implied "variable" is "mode". This form
-                    # is only allowed if there are no other variables.
-                    emacs_vars["mode"] = emacs_var_strs[0].strip()
-                else:
-                    for emacs_var_str in emacs_var_strs:
-                        try:
-                            variable, value = emacs_var_str.strip().split(':', 1)
-                        except ValueError:
-                            log.debug("emacs variables error: malformed -*- "
-                                      "line: %r", emacs_var_str)
-                            continue
-                        # Lowercase the variable name because Emacs allows "Mode"
-                        # or "mode" or "MoDe", etc.
-                        emacs_vars[variable.lower()] = value.strip()
-
-        tail = text[-SIZE:]
-        if "Local Variables" in tail:
-            match = self._emacs_local_vars_pat.search(tail)
-            if match:
-                prefix = match.group("prefix")
-                suffix = match.group("suffix")
-                lines = match.group("content").splitlines(0)
-                # print "prefix=%r, suffix=%r, content=%r, lines: %s"\
-                #      % (prefix, suffix, match.group("content"), lines)
-
-                # Validate the Local Variables block: proper prefix and suffix
-                # usage.
-                for i, line in enumerate(lines):
-                    if not line.startswith(prefix):
-                        log.debug("emacs variables error: line '%s' "
-                                  "does not use proper prefix '%s'"
-                                  % (line, prefix))
-                        return {}
-                    # Don't validate suffix on last line. Emacs doesn't care,
-                    # neither should we.
-                    if i != len(lines)-1 and not line.endswith(suffix):
-                        log.debug("emacs variables error: line '%s' "
-                                  "does not use proper suffix '%s'"
-                                  % (line, suffix))
-                        return {}
-
-                # Parse out one emacs var per line.
-                continued_for = None
-                for line in lines[:-1]:  # no var on the last line ("PREFIX End:")
-                    if prefix: line = line[len(prefix):]  # strip prefix
-                    if suffix: line = line[:-len(suffix)]  # strip suffix
-                    line = line.strip()
-                    if continued_for:
-                        variable = continued_for
-                        if line.endswith('\\'):
-                            line = line[:-1].rstrip()
-                        else:
-                            continued_for = None
-                        emacs_vars[variable] += ' ' + line
-                    else:
-                        try:
-                            variable, value = line.split(':', 1)
-                        except ValueError:
-                            log.debug("local variables error: missing colon "
-                                      "in local variables entry: '%s'" % line)
-                            continue
-                        # Do NOT lowercase the variable name, because Emacs only
-                        # allows "mode" (and not "Mode", "MoDe", etc.) in this block.
-                        value = value.strip()
-                        if value.endswith('\\'):
-                            value = value[:-1].rstrip()
-                            continued_for = variable
-                        else:
-                            continued_for = None
-                        emacs_vars[variable] = value
-
-        # Unquote values.
-        for var, val in list(emacs_vars.items()):
-            if len(val) > 1 and (val.startswith('"') and val.endswith('"')
-               or val.startswith('"') and val.endswith('"')):
-                emacs_vars[var] = val[1:-1]
-
-        return emacs_vars
-
-    def _detab_line(self, line):
-        r"""Recusively convert tabs to spaces in a single line.
-
-        Called from _detab()."""
-        if '\t' not in line:
-            return line
-        chunk1, chunk2 = line.split('\t', 1)
-        chunk1 += (' ' * (self.tab_width - len(chunk1) % self.tab_width))
-        output = chunk1 + chunk2
-        return self._detab_line(output)
-
-    def _detab(self, text):
-        r"""Iterate text line by line and convert tabs to spaces.
-
-            >>> m = Markdown()
-            >>> m._detab("\tfoo")
-            '    foo'
-            >>> m._detab("  \tfoo")
-            '    foo'
-            >>> m._detab("\t  foo")
-            '      foo'
-            >>> m._detab("  foo")
-            '  foo'
-            >>> m._detab("  foo\n\tbar\tblam")
-            '  foo\n    bar blam'
-        """
-        if '\t' not in text:
-            return text
-        output = []
-        for line in text.splitlines():
-            output.append(self._detab_line(line))
-        return '\n'.join(output)
-
-    # I broke out the html5 tags here and add them to _block_tags_a and
-    # _block_tags_b.  This way html5 tags are easy to keep track of.
-    _html5tags = '|article|aside|header|hgroup|footer|nav|section|figure|figcaption'
-
-    _block_tags_a = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del|style'
-    _block_tags_a += _html5tags
-
-    _strict_tag_block_re = re.compile(r"""
-        (                       # save in \1
-            ^                   # start of line  (with re.M)
-            <(%s)               # start tag = \2
-            \b                  # word break
-            (.*\n)*?            # any number of lines, minimally matching
-            </\2>               # the matching end tag
-            [ \t]*              # trailing spaces/tabs
-            (?=\n+|\Z)          # followed by a newline or end of document
-        )
-        """ % _block_tags_a,
-        re.X | re.M)
-
-    _block_tags_b = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math'
-    _block_tags_b += _html5tags
-
-    _span_tags = (
-        'a|abbr|acronym|b|bdo|big|br|button|cite|code|dfn|em|i|img|input|kbd|label|map|object|output|q'
-        '|samp|script|select|small|span|strong|sub|sup|textarea|time|tt|var'
-    )
-
-    _liberal_tag_block_re = re.compile(r"""
-        (                       # save in \1
-            ^                   # start of line  (with re.M)
-            <(%s)               # start tag = \2
-            \b                  # word break
-            (.*\n)*?            # any number of lines, minimally matching
-            .*</\2>             # the matching end tag
-            [ \t]*              # trailing spaces/tabs
-            (?=\n+|\Z)          # followed by a newline or end of document
-        )
-        """ % _block_tags_b,
-        re.X | re.M)
-
-    _html_markdown_attr_re = re.compile(
-        r'''\s+markdown=("1"|'1')''')
-    def _hash_html_block_sub(self, match, raw=False):
-        if isinstance(match, str):
-            html = match
-            tag = None
-        else:
-            html = match.group(1)
-            try:
-                tag = match.group(2)
-            except IndexError:
-                tag = None
-
-        tag = tag or re.match(r'.*?<(\S).*?>', html).group(1)
-
-        if raw and self.safe_mode:
-            html = self._sanitize_html(html)
-        elif 'markdown-in-html' in self.extras and 'markdown=' in html:
-            first_line = html.split('\n', 1)[0]
-            m = self._html_markdown_attr_re.search(first_line)
-            if m:
-                lines = html.split('\n')
-                # if MD is on same line as opening tag then split across two lines
-                lines = list(filter(None, (re.split(r'(.*?<%s.*markdown=.*?>)' % tag, lines[0])))) + lines[1:]
-                # if MD on same line as closing tag, split across two lines
-                lines = lines[:-1] + list(filter(None, re.split(r'(\s*?</%s>.*?$)' % tag, lines[-1])))
-                # extract key sections of the match
-                first_line = lines[0]
-                middle = '\n'.join(lines[1:-1])
-                last_line = lines[-1]
-                # remove `markdown="1"` attr from tag
-                first_line = first_line[:m.start()] + first_line[m.end():]
-                # hash the HTML segments to protect them
-                f_key = _hash_text(first_line)
-                self.html_blocks[f_key] = first_line
-                l_key = _hash_text(last_line)
-                self.html_blocks[l_key] = last_line
-                return ''.join(["\n\n", f_key,
-                    "\n\n", middle, "\n\n",
-                    l_key, "\n\n"])
-        elif self.extras.get('header-ids', {}).get('mixed') and self._h_tag_re.match(html):
-            html = self._h_tag_re.sub(self._h_tag_sub, html)
-        key = _hash_text(html)
-        self.html_blocks[key] = html
-        return "\n\n" + key + "\n\n"
-
-    @mark_stage(Stage.HASH_HTML)
-    def _hash_html_blocks(self, text, raw=False):
-        """Hashify HTML blocks
-
-        We only want to do this for block-level HTML tags, such as headers,
-        lists, and tables. That's because we still want to wrap <p>s around
-        "paragraphs" that are wrapped in non-block-level tags, such as anchors,
-        phrase emphasis, and spans. The list of tags we're looking for is
-        hard-coded.
-
-        @param raw {boolean} indicates if these are raw HTML blocks in
-            the original source. It makes a difference in "safe" mode.
-        """
-        if '<' not in text:
-            return text
-
-        # Pass `raw` value into our calls to self._hash_html_block_sub.
-        hash_html_block_sub = _curry(self._hash_html_block_sub, raw=raw)
-
-        # First, look for nested blocks, e.g.:
-        #   <div>
-        #       <div>
-        #       tags for inner block must be indented.
-        #       </div>
-        #   </div>
-        #
-        # The outermost tags must start at the left margin for this to match, and
-        # the inner nested divs must be indented.
-        # We need to do this before the next, more liberal match, because the next
-        # match will start at the first `<div>` and stop at the first `</div>`.
-        text = self._strict_tag_block_sub(text, self._block_tags_a, hash_html_block_sub)
-
-        # Now match more liberally, simply from `\n<tag>` to `</tag>\n`
-        text = self._liberal_tag_block_re.sub(hash_html_block_sub, text)
-
-        # now do the same for spans that are acting like blocks
-        # eg: an anchor split over multiple lines for readability
-        text = self._strict_tag_block_sub(
-            text, self._span_tags,
-            # inline elements can't contain block level elements, so only span gamut is required
-            lambda t: hash_html_block_sub(self._run_span_gamut(t))
-        )
-
-        # Special case just for <hr />. It was easier to make a special
-        # case than to make the other regex more complicated.
-        if "<hr" in text:
-            _hr_tag_re = _hr_tag_re_from_tab_width(self.tab_width)
-            text = _hr_tag_re.sub(hash_html_block_sub, text)
-
-        # Special case for standalone HTML comments:
-        if "<!--" in text:
-            start = 0
-            while True:
-                # Delimiters for next comment block.
-                try:
-                    start_idx = text.index("<!--", start)
-                except ValueError:
-                    break
-                try:
-                    end_idx = text.index("-->", start_idx) + 3
-                except ValueError:
-                    break
-
-                # Start position for next comment block search.
-                start = end_idx
-
-                # Validate whitespace before comment.
-                if start_idx:
-                    # - Up to `tab_width - 1` spaces before start_idx.
-                    for i in range(self.tab_width - 1):
-                        if text[start_idx - 1] != ' ':
-                            break
-                        start_idx -= 1
-                        if start_idx == 0:
-                            break
-                    # - Must be preceded by 2 newlines or hit the start of
-                    #   the document.
-                    if start_idx == 0:
-                        pass
-                    elif start_idx == 1 and text[0] == '\n':
-                        start_idx = 0  # to match minute detail of Markdown.pl regex
-                    elif text[start_idx-2:start_idx] == '\n\n':
-                        pass
-                    else:
-                        break
-
-                # Validate whitespace after comment.
-                # - Any number of spaces and tabs.
-                while end_idx < len(text):
-                    if text[end_idx] not in ' \t':
-                        break
-                    end_idx += 1
-                # - Must be following by 2 newlines or hit end of text.
-                if text[end_idx:end_idx+2] not in ('', '\n', '\n\n'):
-                    continue
-
-                # Escape and hash (must match `_hash_html_block_sub`).
-                html = text[start_idx:end_idx]
-                if raw and self.safe_mode:
-                    html = self._sanitize_html(html)
-                key = _hash_text(html)
-                self.html_blocks[key] = html
-                text = text[:start_idx] + "\n\n" + key + "\n\n" + text[end_idx:]
-
-        if "xml" in self.extras:
-            # Treat XML processing instructions and namespaced one-liner
-            # tags as if they were block HTML tags. E.g., if standalone
-            # (i.e. are their own paragraph), the following do not get
-            # wrapped in a <p> tag:
-            #    <?foo bar?>
-            #
-            #    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="chapter_1.md"/>
-            _xml_oneliner_re = _xml_oneliner_re_from_tab_width(self.tab_width)
-            text = _xml_oneliner_re.sub(hash_html_block_sub, text)
-
-        return text
-
-    def _strict_tag_block_sub(self, text, html_tags_re, callback, allow_indent=False):
-        '''
-        Finds and substitutes HTML blocks within blocks of text
-
-        Args:
-            text: the text to search
-            html_tags_re: a regex pattern of HTML block tags to match against.
-                For example, `Markdown._block_tags_a`
-            callback: callback function that receives the found HTML text block
-            allow_indent: allow matching HTML blocks that are not completely outdented
-        '''
-        tag_count = 0
-        current_tag = html_tags_re
-        block = ''
-        result = ''
-
-        for chunk in text.splitlines(True):
-            is_markup = re.match(
-                r'^(\s{0,%s})(?:</code>(?=</pre>))?(</?(%s)\b>?)' % ('' if allow_indent else '0', current_tag), chunk
-            )
-            block += chunk
-
-            if is_markup:
-                if chunk.startswith('%s</' % is_markup.group(1)):
-                    tag_count -= 1
-                else:
-                    # if close tag is in same line
-                    if self._tag_is_closed(is_markup.group(3), chunk):
-                        # we must ignore these
-                        is_markup = None
-                    else:
-                        tag_count += 1
-                        current_tag = is_markup.group(3)
-
-            if tag_count == 0:
-                if is_markup:
-                    block = callback(block.rstrip('\n'))  # remove trailing newline
-                current_tag = html_tags_re
-                result += block
-                block = ''
-
-        result += block
-
-        return result
-
-    def _tag_is_closed(self, tag_name, text):
-        # super basic check if number of open tags == number of closing tags
-        return len(re.findall('<%s(?:.*?)>' % tag_name, text)) == len(re.findall('</%s>' % tag_name, text))
-
-    @mark_stage(Stage.LINK_DEFS)
-    def _strip_link_definitions(self, text):
-        # Strips link definitions from text, stores the URLs and titles in
-        # hash references.
-        less_than_tab = self.tab_width - 1
-
-        # Link defs are in the form:
-        #   [id]: url "optional title"
-        _link_def_re = re.compile(r"""
-            ^[ ]{0,%d}\[(.+)\]: # id = \1
-              [ \t]*
-              \n?               # maybe *one* newline
-              [ \t]*
-            <?(.+?)>?           # url = \2
-              [ \t]*
-            (?:
-                \n?             # maybe one newline
-                [ \t]*
-                (?<=\s)         # lookbehind for whitespace
-                ['"(]
-                ([^\n]*)        # title = \3
-                ['")]
-                [ \t]*
-            )?  # title is optional
-            (?:\n+|\Z)
-            """ % less_than_tab, re.X | re.M | re.U)
-        return _link_def_re.sub(self._extract_link_def_sub, text)
-
-    def _extract_link_def_sub(self, match):
-        id, url, title = match.groups()
-        key = id.lower()    # Link IDs are case-insensitive
-        self.urls[key] = self._encode_amps_and_angles(url)
-        if title:
-            self.titles[key] = title
-        return ""
-
-    def _extract_footnote_def_sub(self, match):
-        id, text = match.groups()
-        text = _dedent(text, skip_first_line=not text.startswith('\n')).strip()
-        normed_id = re.sub(r'\W', '-', id)
-        # Ensure footnote text ends with a couple newlines (for some
-        # block gamut matches).
-        self.footnotes[normed_id] = text + "\n\n"
-        return ""
-
-    def _strip_footnote_definitions(self, text):
-        """A footnote definition looks like this:
-
-            [^note-id]: Text of the note.
-
-                May include one or more indented paragraphs.
-
-        Where,
-        - The 'note-id' can be pretty much anything, though typically it
-          is the number of the footnote.
-        - The first paragraph may start on the next line, like so:
-
-            [^note-id]:
-                Text of the note.
-        """
-        less_than_tab = self.tab_width - 1
-        footnote_def_re = re.compile(r'''
-            ^[ ]{0,%d}\[\^(.+)\]:   # id = \1
-            [ \t]*
-            (                       # footnote text = \2
-              # First line need not start with the spaces.
-              (?:\s*.*\n+)
-              (?:
-                (?:[ ]{%d} | \t)  # Subsequent lines must be indented.
-                .*\n+
-              )*
-            )
-            # Lookahead for non-space at line-start, or end of doc.
-            (?:(?=^[ ]{0,%d}\S)|\Z)
-            ''' % (less_than_tab, self.tab_width, self.tab_width),
-            re.X | re.M)
-        return footnote_def_re.sub(self._extract_footnote_def_sub, text)
-
-    _hr_re = re.compile(r'^[ ]{0,3}([-_*])[ ]{0,2}(\1[ ]{0,2}){2,}$', re.M)
-
-    @mark_stage(Stage.BLOCK_GAMUT)
-    def _run_block_gamut(self, text):
-        # These are all the transformations that form block-level
-        # tags like paragraphs, headers, and list items.
-
-        text = self._do_headers(text)
-
-        # Do Horizontal Rules:
-        # On the number of spaces in horizontal rules: The spec is fuzzy: "If
-        # you wish, you may use spaces between the hyphens or asterisks."
-        # Markdown.pl 1.0.1's hr regexes limit the number of spaces between the
-        # hr chars to one or two. We'll reproduce that limit here.
-        hr = "\n<hr"+self.empty_element_suffix+"\n"
-        text = re.sub(self._hr_re, hr, text)
-
-        text = self._do_lists(text)
-
-        text = self._do_code_blocks(text)
-
-        text = self._do_block_quotes(text)
-
-        # We already ran _HashHTMLBlocks() before, in Markdown(), but that
-        # was to escape raw HTML in the original Markdown source. This time,
-        # we're escaping the markup we've just created, so that we don't wrap
-        # <p> tags around block-level tags.
-        text = self._hash_html_blocks(text)
-
-        text = self._form_paragraphs(text)
-
-        return text
-
-    @mark_stage(Stage.SPAN_GAMUT)
-    def _run_span_gamut(self, text):
-        # These are all the transformations that occur *within* block-level
-        # tags like paragraphs, headers, and list items.
-
-        text = self._do_code_spans(text)
-
-        text = self._escape_special_chars(text)
-
-        # Process anchor and image tags.
-        text = self._do_links(text)
-
-        # Make links out of things like `<http://example.com/>`
-        # Must come after _do_links(), because you can use < and >
-        # delimiters in inline links like [this](<url>).
-        text = self._do_auto_links(text)
-
-        text = self._encode_amps_and_angles(text)
-
-        text = self._do_italics_and_bold(text)
-
-        # Do hard breaks
-        text = re.sub(r" {2,}\n(?!\<(?:\/?(ul|ol|li))\>)", "<br%s\n" % self.empty_element_suffix, text)
-
-        return text
-
-    # "Sorta" because auto-links are identified as "tag" tokens.
-    _sorta_html_tokenize_re = re.compile(r"""
-        (
-            \\*  # escapes
-            (?:
-                # tag
-                </?
-                (?:\w+)                                     # tag name
-                (?:\s+(?:[\w-]+:)?[\w-]+=(?:".*?"|'.*?'))*  # attributes
-                \s*/?>
-                |
-                # auto-link (e.g., <http://www.activestate.com/>)
-                <[\w~:/?#\[\]@!$&'\(\)*+,;%=\.\\-]+>
-                |
-                <!--.*?-->      # comment
-                |
-                <\?.*?\?>       # processing instruction
-            )
-        )
-        """, re.X)
-
-    @mark_stage(Stage.ESCAPE_SPECIAL)
-    def _escape_special_chars(self, text):
-        # Python markdown note: the HTML tokenization here differs from
-        # that in Markdown.pl, hence the behaviour for subtle cases can
-        # differ (I believe the tokenizer here does a better job because
-        # it isn't susceptible to unmatched '<' and '>' in HTML tags).
-        # Note, however, that '>' is not allowed in an auto-link URL
-        # here.
-        lead_escape_re = re.compile(r'^((?:\\\\)*(?!\\))')
-        escaped = []
-        is_html_markup = False
-        for token in self._sorta_html_tokenize_re.split(text):
-            # check token is preceded by 0 or more PAIRS of escapes, because escape pairs
-            # escape themselves and don't affect the token
-            if is_html_markup and lead_escape_re.match(token):
-                # Within tags/HTML-comments/auto-links, encode * and _
-                # so they don't conflict with their use in Markdown for
-                # italics and strong.  We're replacing each such
-                # character with its corresponding MD5 checksum value;
-                # this is likely overkill, but it should prevent us from
-                # colliding with the escape values by accident.
-                escape_seq, token = lead_escape_re.split(token)[1:] or ('', token)
-                escaped.append(
-                    escape_seq.replace('\\\\', self._escape_table['\\'])
-                    + token.replace('*', self._escape_table['*'])
-                           .replace('_', self._escape_table['_'])
-                )
-            else:
-                escaped.append(self._encode_backslash_escapes(token.replace('\\<', '&lt;')))
-            is_html_markup = not is_html_markup
-        return ''.join(escaped)
-
-    @mark_stage(Stage.HASH_HTML)
-    def _hash_html_spans(self, text):
-        # Used for safe_mode.
-
-        def _is_auto_link(s):
-            if ':' in s and self._auto_link_re.match(s):
-                return True
-            elif '@' in s and self._auto_email_link_re.match(s):
-                return True
-            return False
-
-        def _is_code_span(index, token):
-            try:
-                if token == '<code>':
-                    peek_tokens = split_tokens[index: index + 3]
-                elif token == '</code>':
-                    peek_tokens = split_tokens[index - 2: index + 1]
-                else:
-                    return False
-            except IndexError:
-                return False
-
-            return re.match(r'<code>md5-[A-Fa-f0-9]{32}</code>', ''.join(peek_tokens))
-
-        def _is_comment(token):
-            if self.safe_mode == 'replace':
-                # don't bother processing each section of comment in replace mode. Just do the whole thing
-                return
-            return re.match(r'(<!--)(.*)(-->)', token)
-
-        def _hash(token):
-            key = _hash_text(token)
-            self.html_spans[key] = token
-            return key
-
-        tokens = []
-        split_tokens = self._sorta_html_tokenize_re.split(text)
-        is_html_markup = False
-        for index, token in enumerate(split_tokens):
-            if is_html_markup and not _is_auto_link(token) and not _is_code_span(index, token):
-                is_comment = _is_comment(token)
-                if is_comment:
-                    tokens.append(_hash(self._sanitize_html(is_comment.group(1))))
-                    # sanitise but leave comment body intact for further markdown processing
-                    tokens.append(self._sanitize_html(is_comment.group(2)))
-                    tokens.append(_hash(self._sanitize_html(is_comment.group(3))))
-                else:
-                    tokens.append(_hash(self._sanitize_html(token)))
-            else:
-                tokens.append(self._encode_incomplete_tags(token))
-            is_html_markup = not is_html_markup
-        return ''.join(tokens)
-
-    def _unhash_html_spans(self, text):
-        for key, sanitized in list(self.html_spans.items()):
-            text = text.replace(key, sanitized)
-        return text
-
-    def _sanitize_html(self, s):
-        if self.safe_mode == "replace":
-            return self.html_removed_text
-        elif self.safe_mode == "escape":
-            replacements = [
-                ('&', '&amp;'),
-                ('<', '&lt;'),
-                ('>', '&gt;'),
-            ]
-            for before, after in replacements:
-                s = s.replace(before, after)
-            return s
-        else:
-            raise MarkdownError("invalid value for 'safe_mode': %r (must be "
-                                "'escape' or 'replace')" % self.safe_mode)
-
-    _inline_link_title = re.compile(r'''
-            (                   # \1
-              [ \t]+
-              (['"])            # quote char = \2
-              (?P<title>.*?)
-              \2
-            )?                  # title is optional
-          \)$
-        ''', re.X | re.S)
-    _tail_of_reference_link_re = re.compile(r'''
-          # Match tail of: [text][id]
-          [ ]?          # one optional space
-          (?:\n[ ]*)?   # one optional newline followed by spaces
-          \[
-            (?P<id>.*?)
-          \]
-        ''', re.X | re.S)
-
-    _whitespace = re.compile(r'\s*')
-
-    _strip_anglebrackets = re.compile(r'<(.*)>.*')
-
-    def _find_non_whitespace(self, text, start):
-        """Returns the index of the first non-whitespace character in text
-        after (and including) start
-        """
-        match = self._whitespace.match(text, start)
-        return match.end()
-
-    def _find_balanced(self, text, start, open_c, close_c):
-        """Returns the index where the open_c and close_c characters balance
-        out - the same number of open_c and close_c are encountered - or the
-        end of string if it's reached before the balance point is found.
-        """
-        i = start
-        l = len(text)
-        count = 1
-        while count > 0 and i < l:
-            if text[i] == open_c:
-                count += 1
-            elif text[i] == close_c:
-                count -= 1
-            i += 1
-        return i
-
-    def _extract_url_and_title(self, text, start):
-        """Extracts the url and (optional) title from the tail of a link"""
-        # text[start] equals the opening parenthesis
-        idx = self._find_non_whitespace(text, start+1)
-        if idx == len(text):
-            return None, None, None
-        end_idx = idx
-        has_anglebrackets = text[idx] == "<"
-        if has_anglebrackets:
-            end_idx = self._find_balanced(text, end_idx+1, "<", ">")
-        end_idx = self._find_balanced(text, end_idx, "(", ")")
-        match = self._inline_link_title.search(text, idx, end_idx)
-        if not match:
-            return None, None, None
-        url, title = text[idx:match.start()], match.group("title")
-        if has_anglebrackets:
-            url = self._strip_anglebrackets.sub(r'\1', url)
-        return url, title, end_idx
-
-    # https://developer.mozilla.org/en-US/docs/web/http/basics_of_http/data_urls
-    # https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types
-    _data_url_re = re.compile(r'''
-        data:
-        # in format type/subtype;parameter=optional
-        (?P<mime>\w+/[\w+\.-]+(?:;\w+=[\w+\.-]+)?)?
-        # optional base64 token
-        (?P<token>;base64)?
-        ,(?P<data>.*)
-    ''', re.X)
-
-    def _protect_url(self, url):
-        '''
-        Function that passes a URL through `_html_escape_url` to remove any nasty characters,
-        and then hashes the now "safe" URL to prevent other safety mechanisms from tampering
-        with it (eg: escaping "&" in URL parameters)
-        '''
-        data_url = self._data_url_re.match(url)
-        charset = None
-        if data_url is not None:
-            mime = data_url.group('mime') or ''
-            if mime.startswith('image/') and data_url.group('token') == ';base64':
-                charset='base64'
-        url = _html_escape_url(url, safe_mode=self.safe_mode, charset=charset)
-        key = _hash_text(url)
-        self._escape_table[url] = key
-        return key
-
-    _safe_protocols = r'(?:https?|ftp):\/\/|(?:mailto|tel):'
-
-    @property
-    def _safe_href(self):
-        '''
-        _safe_href is adapted from pagedown's Markdown.Sanitizer.js
-        From: https://github.com/StackExchange/pagedown/blob/master/LICENSE.txt
-        Original Showdown code copyright (c) 2007 John Fraser
-        Modifications and bugfixes (c) 2009 Dana Robinson
-        Modifications and bugfixes (c) 2009-2014 Stack Exchange Inc.
-        '''
-        safe = r'-\w'
-        # omitted ['"<>] for XSS reasons
-        less_safe = r'#/\.!#$%&\(\)\+,/:;=\?@\[\]^`\{\}\|~'
-        # dot seperated hostname, optional port number, not followed by protocol seperator
-        domain = r'(?:[%s]+(?:\.[%s]+)*)(?:(?<!tel):\d+/?)?(?![^:/]*:/*)' % (safe, safe)
-        fragment = r'[%s]*' % (safe + less_safe)
-
-        return re.compile(r'^(?:(%s)?(%s)(%s)|(#|\.{,2}/)(%s))$' % (self._safe_protocols, domain, fragment, fragment), re.I)
-
-    @mark_stage(Stage.LINKS)
-    def _do_links(self, text):
-        """Turn Markdown link shortcuts into XHTML <a> and <img> tags.
-
-        This is a combination of Markdown.pl's _DoAnchors() and
-        _DoImages(). They are done together because that simplified the
-        approach. It was necessary to use a different approach than
-        Markdown.pl because of the lack of atomic matching support in
-        Python's regex engine used in $g_nested_brackets.
-        """
-        MAX_LINK_TEXT_SENTINEL = 3000  # markdown2 issue 24
-
-        # `anchor_allowed_pos` is used to support img links inside
-        # anchors, but not anchors inside anchors. An anchor's start
-        # pos must be `>= anchor_allowed_pos`.
-        anchor_allowed_pos = 0
-
-        curr_pos = 0
-        while True:  # Handle the next link.
-            # The next '[' is the start of:
-            # - an inline anchor:   [text](url "title")
-            # - a reference anchor: [text][id]
-            # - an inline img:      ![text](url "title")
-            # - a reference img:    ![text][id]
-            # - a footnote ref:     [^id]
-            #   (Only if 'footnotes' extra enabled)
-            # - a footnote defn:    [^id]: ...
-            #   (Only if 'footnotes' extra enabled) These have already
-            #   been stripped in _strip_footnote_definitions() so no
-            #   need to watch for them.
-            # - a link definition:  [id]: url "title"
-            #   These have already been stripped in
-            #   _strip_link_definitions() so no need to watch for them.
-            # - not markup:         [...anything else...
-            try:
-                start_idx = text.index('[', curr_pos)
-            except ValueError:
-                break
-            text_length = len(text)
-
-            # Find the matching closing ']'.
-            # Markdown.pl allows *matching* brackets in link text so we
-            # will here too. Markdown.pl *doesn't* currently allow
-            # matching brackets in img alt text -- we'll differ in that
-            # regard.
-            bracket_depth = 0
-            for p in range(start_idx+1, min(start_idx+MAX_LINK_TEXT_SENTINEL,
-                                            text_length)):
-                ch = text[p]
-                if ch == ']':
-                    bracket_depth -= 1
-                    if bracket_depth < 0:
-                        break
-                elif ch == '[':
-                    bracket_depth += 1
-            else:
-                # Closing bracket not found within sentinel length.
-                # This isn't markup.
-                curr_pos = start_idx + 1
-                continue
-            link_text = text[start_idx+1:p]
-
-            # Fix for issue 341 - Injecting XSS into link text
-            if self.safe_mode:
-                link_text = self._hash_html_spans(link_text)
-                link_text = self._unhash_html_spans(link_text)
-
-            # Possibly a footnote ref?
-            if "footnotes" in self.extras and link_text.startswith("^"):
-                normed_id = re.sub(r'\W', '-', link_text[1:])
-                if normed_id in self.footnotes:
-                    self.footnote_ids.append(normed_id)
-                    result = '<sup class="footnote-ref" id="fnref-%s">' \
-                             '<a href="#fn-%s">%s</a></sup>' \
-                             % (normed_id, normed_id, len(self.footnote_ids))
-                    text = text[:start_idx] + result + text[p+1:]
-                else:
-                    # This id isn't defined, leave the markup alone.
-                    curr_pos = p+1
-                continue
-
-            # Now determine what this is by the remainder.
-            p += 1
-
-            # Inline anchor or img?
-            if text[p:p + 1] == '(':  # attempt at perf improvement
-                url, title, url_end_idx = self._extract_url_and_title(text, p)
-                if url is not None:
-                    # Handle an inline anchor or img.
-                    is_img = start_idx > 0 and text[start_idx-1] == "!"
-                    if is_img:
-                        start_idx -= 1
-
-                    # We've got to encode these to avoid conflicting
-                    # with italics/bold.
-                    url = url.replace('*', self._escape_table['*']) \
-                             .replace('_', self._escape_table['_'])
-                    if title:
-                        title_str = ' title="%s"' % (
-                            _xml_escape_attr(title)
-                                .replace('*', self._escape_table['*'])
-                                .replace('_', self._escape_table['_']))
-                    else:
-                        title_str = ''
-                    if is_img:
-                        img_class_str = self._html_class_str_from_tag("img")
-                        result = '<img src="%s" alt="%s"%s%s%s' \
-                            % (self._protect_url(url),
-                               _xml_escape_attr(link_text),
-                               title_str,
-                               img_class_str,
-                               self.empty_element_suffix)
-                        if "smarty-pants" in self.extras:
-                            result = result.replace('"', self._escape_table['"'])
-                        curr_pos = start_idx + len(result)
-                        anchor_allowed_pos = start_idx + len(result)
-                        text = text[:start_idx] + result + text[url_end_idx:]
-                    elif start_idx >= anchor_allowed_pos:
-                        safe_link = self._safe_href.match(url)
-                        if self.safe_mode and not safe_link:
-                            result_head = '<a href="#"%s>' % (title_str)
-                        else:
-                            result_head = '<a href="%s"%s>' % (self._protect_url(url), title_str)
-                        result = '%s%s</a>' % (result_head, link_text)
-                        if "smarty-pants" in self.extras:
-                            result = result.replace('"', self._escape_table['"'])
-                        # <img> allowed from curr_pos on, <a> from
-                        # anchor_allowed_pos on.
-                        curr_pos = start_idx + len(result_head)
-                        anchor_allowed_pos = start_idx + len(result)
-                        text = text[:start_idx] + result + text[url_end_idx:]
-                    else:
-                        # Anchor not allowed here.
-                        curr_pos = start_idx + 1
-                    continue
-
-            # Reference anchor or img?
-            else:
-                match = self._tail_of_reference_link_re.match(text, p)
-                if match:
-                    # Handle a reference-style anchor or img.
-                    is_img = start_idx > 0 and text[start_idx-1] == "!"
-                    if is_img:
-                        start_idx -= 1
-                    link_id = match.group("id").lower()
-                    if not link_id:
-                        link_id = link_text.lower()  # for links like [this][]
-                    if link_id in self.urls:
-                        url = self.urls[link_id]
-                        # We've got to encode these to avoid conflicting
-                        # with italics/bold.
-                        url = url.replace('*', self._escape_table['*']) \
-                                 .replace('_', self._escape_table['_'])
-                        title = self.titles.get(link_id)
-                        if title:
-                            title = _xml_escape_attr(title) \
-                                .replace('*', self._escape_table['*']) \
-                                .replace('_', self._escape_table['_'])
-                            title_str = ' title="%s"' % title
-                        else:
-                            title_str = ''
-                        if is_img:
-                            img_class_str = self._html_class_str_from_tag("img")
-                            result = '<img src="%s" alt="%s"%s%s%s' \
-                                % (self._protect_url(url),
-                                   _xml_escape_attr(link_text),
-                                   title_str,
-                                   img_class_str,
-                                   self.empty_element_suffix)
-                            if "smarty-pants" in self.extras:
-                                result = result.replace('"', self._escape_table['"'])
-                            curr_pos = start_idx + len(result)
-                            text = text[:start_idx] + result + text[match.end():]
-                        elif start_idx >= anchor_allowed_pos:
-                            if self.safe_mode and not self._safe_href.match(url):
-                                result_head = '<a href="#"%s>' % (title_str)
-                            else:
-                                result_head = '<a href="%s"%s>' % (self._protect_url(url), title_str)
-                            result = '%s%s</a>' % (result_head, link_text)
-                            if "smarty-pants" in self.extras:
-                                result = result.replace('"', self._escape_table['"'])
-                            # <img> allowed from curr_pos on, <a> from
-                            # anchor_allowed_pos on.
-                            curr_pos = start_idx + len(result_head)
-                            anchor_allowed_pos = start_idx + len(result)
-                            text = text[:start_idx] + result + text[match.end():]
-                        else:
-                            # Anchor not allowed here.
-                            curr_pos = start_idx + 1
-                    else:
-                        # This id isn't defined, leave the markup alone.
-                        # set current pos to end of link title and continue from there
-                        curr_pos = p
-                    continue
-
-            # Otherwise, it isn't markup.
-            curr_pos = start_idx + 1
-
-        return text
-
-    def header_id_from_text(self, text, prefix, n):
-        """Generate a header id attribute value from the given header
-        HTML content.
-
-        This is only called if the "header-ids" extra is enabled.
-        Subclasses may override this for different header ids.
-
-        @param text {str} The text of the header tag
-        @param prefix {str} The requested prefix for header ids. This is the
-            value of the "header-ids" extra key, if any. Otherwise, None.
-        @param n {int} The <hN> tag number, i.e. `1` for an <h1> tag.
-        @returns {str} The value for the header tag's "id" attribute. Return
-            None to not have an id attribute and to exclude this header from
-            the TOC (if the "toc" extra is specified).
-        """
-        header_id = _slugify(text)
-        if prefix and isinstance(prefix, str):
-            header_id = prefix + '-' + header_id
-
-        self._count_from_header_id[header_id] += 1
-        if 0 == len(header_id) or self._count_from_header_id[header_id] > 1:
-            header_id += '-%s' % self._count_from_header_id[header_id]
-
-        return header_id
-
-    def _header_id_exists(self, text):
-        header_id = _slugify(text)
-        prefix = self.extras['header-ids'].get('prefix')
-        if prefix and isinstance(prefix, str):
-            header_id = prefix + '-' + header_id
-        return header_id in self._count_from_header_id or header_id in map(lambda x: x[1], self._toc)
-
-    def _toc_add_entry(self, level, id, name):
-        if level > self._toc_depth:
-            return
-        if self._toc is None:
-            self._toc = []
-        self._toc.append((level, id, self._unescape_special_chars(name)))
-
-    _h_re_base = r'''
-        (^(.+)[ \t]{0,99}\n(=+|-+)[ \t]*\n+)
-        |
-        (^(\#{1,6})  # \1 = string of #'s
-        [ \t]%s
-        (.+?)       # \2 = Header text
-        [ \t]{0,99}
-        (?<!\\)     # ensure not an escaped trailing '#'
-        \#*         # optional closing #'s (not counted)
-        \n+
-        )
-        '''
-
-    _h_re = re.compile(_h_re_base % '*', re.X | re.M)
-    _h_re_tag_friendly = re.compile(_h_re_base % '+', re.X | re.M)
-
-    def _h_sub(self, match):
-        '''Handles processing markdown headers'''
-        if match.group(1) is not None and match.group(3) == "-":
-            return match.group(1)
-        elif match.group(1) is not None:
-            # Setext header
-            n = {"=": 1, "-": 2}[match.group(3)[0]]
-            header_group = match.group(2)
-        else:
-            # atx header
-            n = len(match.group(5))
-            header_group = match.group(6)
-
-        demote_headers = self.extras.get("demote-headers")
-        if demote_headers:
-            n = min(n + demote_headers, 6)
-        header_id_attr = ""
-        if "header-ids" in self.extras:
-            header_id = self.header_id_from_text(header_group,
-                self.extras["header-ids"].get('prefix'), n)
-            if header_id:
-                header_id_attr = ' id="%s"' % header_id
-        html = self._run_span_gamut(header_group)
-        if "toc" in self.extras and header_id:
-            self._toc_add_entry(n, header_id, html)
-        return "<h%d%s>%s</h%d>\n\n" % (n, header_id_attr, html, n)
-
-    _h_tag_re = re.compile(r'''
-        ^<h([1-6])(.*)>  # \1 tag num, \2 attrs
-        (.*)  # \3 text
-        </h\1>
-    ''', re.X | re.M)
-
-    def _h_tag_sub(self, match):
-        '''Different to `_h_sub` in that this function handles existing HTML headers'''
-        text = match.string[match.start(): match.end()]
-        h_level = int(match.group(1))
-        # extract id= attr from tag, trying to account for regex "misses"
-        id_attr = (re.match(r'.*?id=(\S+)?.*', match.group(2) or '') or '')
-        if id_attr:
-            # if id attr exists, extract that
-            id_attr = id_attr.group(1) or ''
-        id_attr = id_attr.strip('\'" ')
-        h_text = match.group(3)
-
-        # check if header was already processed (ie: was a markdown header rather than HTML)
-        if id_attr and self._header_id_exists(id_attr):
-            return text
-
-        # generate new header id if none existed
-        header_id = id_attr or self.header_id_from_text(h_text, self.extras['header-ids'].get('prefix'), h_level)
-        if "toc" in self.extras:
-            self._toc_add_entry(h_level, header_id, h_text)
-        if header_id and not id_attr:
-            # '<h[digit]' + new ID + '...'
-            return text[:3] + ' id="%s"' % header_id + text[3:]
-        return text
-
-    @mark_stage(Stage.HEADERS)
-    def _do_headers(self, text):
-        # Setext-style headers:
-        #     Header 1
-        #     ========
-        #
-        #     Header 2
-        #     --------
-
-        # atx-style headers:
-        #   # Header 1
-        #   ## Header 2
-        #   ## Header 2 with closing hashes ##
-        #   ...
-        #   ###### Header 6
-
-        if 'tag-friendly' in self.extras:
-            return self._h_re_tag_friendly.sub(self._h_sub, text)
-        return self._h_re.sub(self._h_sub, text)
-
-    _marker_ul_chars = '*+-'
-    _marker_any = r'(?:[%s]|\d+\.)' % _marker_ul_chars
-    _marker_ul = '(?:[%s])' % _marker_ul_chars
-    _marker_ol = r'(?:\d+\.)'
-
-    def _list_sub(self, match):
-        lst = match.group(1)
-        lst_type = match.group(4) in self._marker_ul_chars and "ul" or "ol"
-
-        if lst_type == 'ol' and match.group(4) != '1.':
-            # if list doesn't start at 1 then set the ol start attribute
-            lst_opts = ' start="%s"' % match.group(4)[:-1]
-        else:
-            lst_opts = ''
-
-        lst_opts = lst_opts + self._html_class_str_from_tag(lst_type)
-
-        result = self._process_list_items(lst)
-        if self.list_level:
-            return "<%s%s>\n%s</%s>\n" % (lst_type, lst_opts, result, lst_type)
-        else:
-            return "<%s%s>\n%s</%s>\n\n" % (lst_type, lst_opts, result, lst_type)
-
-    @mark_stage(Stage.LISTS)
-    def _do_lists(self, text):
-        # Form HTML ordered (numbered) and unordered (bulleted) lists.
-
-        # Iterate over each *non-overlapping* list match.
-        pos = 0
-        while True:
-            # Find the *first* hit for either list style (ul or ol). We
-            # match ul and ol separately to avoid adjacent lists of different
-            # types running into each other (see issue #16).
-            hits = []
-            for marker_pat in (self._marker_ul, self._marker_ol):
-                less_than_tab = self.tab_width - 1
-                other_marker_pat = self._marker_ul if marker_pat == self._marker_ol else self._marker_ol
-                whole_list = r'''
-                    (                   # \1 = whole list
-                      (                 # \2
-                        ([ ]{0,%d})     # \3 = the indentation level of the list item marker
-                        (%s)            # \4 = first list item marker
-                        [ \t]+
-                        (?!\ *\4\ )     # '- - - ...' isn't a list. See 'not_quite_a_list' test case.
-                      )
-                      (?:.+?)
-                      (                 # \5
-                          \Z
-                        |
-                          \n{2,}
-                          (?=\S)
-                          (?!           # Negative lookahead for another list item marker
-                            [ \t]*
-                            %s[ \t]+
-                          )
-                        |
-                          \n+
-                          (?=
-                            \3          # lookahead for a different style of list item marker
-                            %s[ \t]+
-                          )
-                      )
-                    )
-                ''' % (less_than_tab, marker_pat, marker_pat, other_marker_pat)
-                if self.list_level:  # sub-list
-                    list_re = re.compile("^"+whole_list, re.X | re.M | re.S)
-                else:
-                    list_re = re.compile(r"(?:(?<=\n\n)|\A\n?)"+whole_list,
-                                         re.X | re.M | re.S)
-                match = list_re.search(text, pos)
-                if match:
-                    hits.append((match.start(), match))
-            if not hits:
-                break
-            hits.sort()
-            match = hits[0][1]
-            start, end = match.span()
-            middle = self._list_sub(match)
-            text = text[:start] + middle + text[end:]
-            pos = start + len(middle)  # start pos for next attempted match
-
-        return text
-
-    _list_item_re = re.compile(r'''
-        (\n)?                   # leading line = \1
-        (^[ \t]*)               # leading whitespace = \2
-        (?P<marker>%s) [ \t]+   # list marker = \3
-        ((?:.+?)                # list item text = \4
-        (\n{1,2}))              # eols = \5
-        (?= \n* (\Z | \2 (?P<next_marker>%s) [ \t]+))
-        ''' % (_marker_any, _marker_any),
-        re.M | re.X | re.S)
-
-    _task_list_item_re = re.compile(r'''
-        (\[[\ xX]\])[ \t]+       # tasklist marker = \1
-        (.*)                   # list item text = \2
-    ''', re.M | re.X | re.S)
-
-    _task_list_warpper_str = r'<input type="checkbox" class="task-list-item-checkbox" %sdisabled> %s'
-
-    def _task_list_item_sub(self, match):
-        marker = match.group(1)
-        item_text = match.group(2)
-        if marker in ['[x]','[X]']:
-                return self._task_list_warpper_str % ('checked ', item_text)
-        elif marker == '[ ]':
-                return self._task_list_warpper_str % ('', item_text)
-
-    _last_li_endswith_two_eols = False
-    def _list_item_sub(self, match):
-        item = match.group(4)
-        leading_line = match.group(1)
-        if leading_line or "\n\n" in item or self._last_li_endswith_two_eols:
-            item = self._uniform_outdent(item, min_outdent=' ', max_outdent=self.tab)[1]
-            item = self._run_block_gamut(item)
-        else:
-            # Recursion for sub-lists:
-            item = self._do_lists(self._uniform_outdent(item, min_outdent=' ')[1])
-            if item.endswith('\n'):
-                item = item[:-1]
-            item = self._run_span_gamut(item)
-        self._last_li_endswith_two_eols = (len(match.group(5)) == 2)
-
-        if "task_list" in self.extras:
-            item = self._task_list_item_re.sub(self._task_list_item_sub, item)
-
-        return "<li>%s</li>\n" % item
-
-    def _process_list_items(self, list_str):
-        # Process the contents of a single ordered or unordered list,
-        # splitting it into individual list items.
-
-        # The $g_list_level global keeps track of when we're inside a list.
-        # Each time we enter a list, we increment it; when we leave a list,
-        # we decrement. If it's zero, we're not in a list anymore.
-        #
-        # We do this because when we're not inside a list, we want to treat
-        # something like this:
-        #
-        #       I recommend upgrading to version
-        #       8. Oops, now this line is treated
-        #       as a sub-list.
-        #
-        # As a single paragraph, despite the fact that the second line starts
-        # with a digit-period-space sequence.
-        #
-        # Whereas when we're inside a list (or sub-list), that line will be
-        # treated as the start of a sub-list. What a kludge, huh? This is
-        # an aspect of Markdown's syntax that's hard to parse perfectly
-        # without resorting to mind-reading. Perhaps the solution is to
-        # change the syntax rules such that sub-lists must start with a
-        # starting cardinal number; e.g. "1." or "a.".
-        self.list_level += 1
-        self._last_li_endswith_two_eols = False
-        list_str = list_str.rstrip('\n') + '\n'
-        list_str = self._list_item_re.sub(self._list_item_sub, list_str)
-        self.list_level -= 1
-        return list_str
-
-    def _get_pygments_lexer(self, lexer_name):
-        try:
-            from pygments import lexers, util
-        except ImportError:
-            return None
-        try:
-            return lexers.get_lexer_by_name(lexer_name)
-        except util.ClassNotFound:
-            return None
-
-    def _color_with_pygments(self, codeblock, lexer, **formatter_opts):
-        import pygments
-        import pygments.formatters
-
-        class HtmlCodeFormatter(pygments.formatters.HtmlFormatter):
-            def _wrap_code(self, inner):
-                """A function for use in a Pygments Formatter which
-                wraps in <code> tags.
-                """
-                yield 0, "<code>"
-                for tup in inner:
-                    yield tup
-                yield 0, "</code>"
-
-            def _add_newline(self, inner):
-                # Add newlines around the inner contents so that _strict_tag_block_re matches the outer div.
-                yield 0, "\n"
-                yield from inner
-                yield 0, "\n"
-
-            def wrap(self, source, outfile=None):
-                """Return the source with a code, pre, and div."""
-                if outfile is None:
-                    # pygments >= 2.12
-                    return self._add_newline(self._wrap_pre(self._wrap_code(source)))
-                else:
-                    # pygments < 2.12
-                    return self._wrap_div(self._add_newline(self._wrap_pre(self._wrap_code(source))))
-
-        formatter_opts.setdefault("cssclass", "codehilite")
-        formatter = HtmlCodeFormatter(**formatter_opts)
-        return pygments.highlight(codeblock, lexer, formatter)
-
-    def _code_block_sub(self, match):
-        codeblock = match.group(1)
-        codeblock = self._outdent(codeblock)
-        codeblock = self._detab(codeblock)
-        codeblock = codeblock.lstrip('\n')  # trim leading newlines
-        codeblock = codeblock.rstrip()      # trim trailing whitespace
-
-        pre_class_str = self._html_class_str_from_tag("pre")
-        code_class_str = self._html_class_str_from_tag("code")
-
-        codeblock = self._encode_code(codeblock)
-
-        return "\n<pre%s><code%s>%s\n</code></pre>\n" % (
-            pre_class_str, code_class_str, codeblock)
-
-    def _html_class_str_from_tag(self, tag):
-        """Get the appropriate ' class="..."' string (note the leading
-        space), if any, for the given tag.
-        """
-        if "html-classes" not in self.extras:
-            return ""
-        try:
-            html_classes_from_tag = self.extras["html-classes"]
-        except TypeError:
-            return ""
-        else:
-            if isinstance(html_classes_from_tag, dict):
-                if tag in html_classes_from_tag:
-                    return ' class="%s"' % html_classes_from_tag[tag]
-        return ""
-
-    @mark_stage(Stage.CODE_BLOCKS)
-    def _do_code_blocks(self, text):
-        """Process Markdown `<pre><code>` blocks."""
-        code_block_re = re.compile(r'''
-            (?:\n\n|\A\n?)
-            (               # $1 = the code block -- one or more lines, starting with a space/tab
-              (?:
-                (?:[ ]{%d} | \t)  # Lines must start with a tab or a tab-width of spaces
-                .*\n+
-              )+
-            )
-            ((?=^[ ]{0,%d}\S)|\Z)   # Lookahead for non-space at line-start, or end of doc
-            # Lookahead to make sure this block isn't already in a code block.
-            # Needed when syntax highlighting is being used.
-            (?!([^<]|<(/?)span)*\</code\>)
-            ''' % (self.tab_width, self.tab_width),
-            re.M | re.X)
-        return code_block_re.sub(self._code_block_sub, text)
-
-    # Rules for a code span:
-    # - backslash escapes are not interpreted in a code span
-    # - to include one or or a run of more backticks the delimiters must
-    #   be a longer run of backticks
-    # - cannot start or end a code span with a backtick; pad with a
-    #   space and that space will be removed in the emitted HTML
-    # See `test/tm-cases/escapes.text` for a number of edge-case
-    # examples.
-    _code_span_re = re.compile(r'''
-            (?<!\\)
-            (`+)        # \1 = Opening run of `
-            (?!`)       # See Note A test/tm-cases/escapes.text
-            (.+?)       # \2 = The code block
-            (?<!`)
-            \1          # Matching closer
-            (?!`)
-        ''', re.X | re.S)
-
-    def _code_span_sub(self, match):
-        c = match.group(2).strip(" \t")
-        c = self._encode_code(c)
-        return "<code%s>%s</code>" % (self._html_class_str_from_tag("code"), c)
-
-    @mark_stage(Stage.CODE_SPANS)
-    def _do_code_spans(self, text):
-        #   *   Backtick quotes are used for <code></code> spans.
-        #
-        #   *   You can use multiple backticks as the delimiters if you want to
-        #       include literal backticks in the code span. So, this input:
-        #
-        #         Just type ``foo `bar` baz`` at the prompt.
-        #
-        #       Will translate to:
-        #
-        #         <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
-        #
-        #       There's no arbitrary limit to the number of backticks you
-        #       can use as delimters. If you need three consecutive backticks
-        #       in your code, use four for delimiters, etc.
-        #
-        #   *   You can use spaces to get literal backticks at the edges:
-        #
-        #         ... type `` `bar` `` ...
-        #
-        #       Turns to:
-        #
-        #         ... type <code>`bar`</code> ...
-        return self._code_span_re.sub(self._code_span_sub, text)
-
-    def _encode_code(self, text):
-        """Encode/escape certain characters inside Markdown code runs.
-        The point is that in code, these characters are literals,
-        and lose their special Markdown meanings.
-        """
-        replacements = [
-            # Encode all ampersands; HTML entities are not
-            # entities within a Markdown code span.
-            ('&', '&amp;'),
-            # Do the angle bracket song and dance:
-            ('<', '&lt;'),
-            ('>', '&gt;'),
-        ]
-        for before, after in replacements:
-            text = text.replace(before, after)
-        hashed = _hash_text(text)
-        self._code_table[text] = hashed
-        return hashed
-
-    _strong_re = re.compile(r"(\*\*|__)(?=\S)(.+?[*_]?)(?<=\S)\1", re.S)
-    _em_re = re.compile(r"(\*|_)(?=\S)(.*?\S)\1", re.S)
-
-    @mark_stage(Stage.ITALIC_AND_BOLD)
-    def _do_italics_and_bold(self, text):
-        # <strong> must go first:
-        text = self._strong_re.sub(r"<strong>\2</strong>", text)
-        text = self._em_re.sub(r"<em>\2</em>", text)
-        return text
-
-    _block_quote_base = r'''
-        (                           # Wrap whole match in \1
-          (
-            ^[ \t]*>%s[ \t]?        # '>' at the start of a line
-              .+\n                  # rest of the first line
-            (.+\n)*                 # subsequent consecutive lines
-          )+
-        )
-    '''
-    _block_quote_re = re.compile(_block_quote_base % '', re.M | re.X)
-    _block_quote_re_spoiler = re.compile(_block_quote_base % '[ \t]*?!?', re.M | re.X)
-    _bq_one_level_re = re.compile('^[ \t]*>[ \t]?', re.M)
-    _bq_one_level_re_spoiler = re.compile('^[ \t]*>[ \t]*?![ \t]?', re.M)
-    _bq_all_lines_spoilers = re.compile(r'\A(?:^[ \t]*>[ \t]*?!.*[\n\r]*)+\Z', re.M)
-    _html_pre_block_re = re.compile(r'(\s*<pre>.+?</pre>)', re.S)
-    def _dedent_two_spaces_sub(self, match):
-        return re.sub(r'(?m)^  ', '', match.group(1))
-
-    def _block_quote_sub(self, match):
-        bq = match.group(1)
-        is_spoiler = 'spoiler' in self.extras and self._bq_all_lines_spoilers.match(bq)
-        # trim one level of quoting
-        if is_spoiler:
-            bq = self._bq_one_level_re_spoiler.sub('', bq)
-        else:
-            bq = self._bq_one_level_re.sub('', bq)
-        # trim whitespace-only lines
-        bq = self._ws_only_line_re.sub('', bq)
-        bq = self._run_block_gamut(bq)          # recurse
-
-        bq = re.sub('(?m)^', '  ', bq)
-        # These leading spaces screw with <pre> content, so we need to fix that:
-        bq = self._html_pre_block_re.sub(self._dedent_two_spaces_sub, bq)
-
-        if is_spoiler:
-            return '<blockquote class="spoiler">\n%s\n</blockquote>\n\n' % bq
-        else:
-            return '<blockquote>\n%s\n</blockquote>\n\n' % bq
-
-    @mark_stage(Stage.BLOCK_QUOTES)
-    def _do_block_quotes(self, text):
-        if '>' not in text:
-            return text
-        if 'spoiler' in self.extras:
-            return self._block_quote_re_spoiler.sub(self._block_quote_sub, text)
-        else:
-            return self._block_quote_re.sub(self._block_quote_sub, text)
-
-    @mark_stage(Stage.PARAGRAPHS)
-    def _form_paragraphs(self, text):
-        # Strip leading and trailing lines:
-        text = text.strip('\n')
-
-        # Wrap <p> tags.
-        grafs = []
-        for i, graf in enumerate(re.split(r"\n{2,}", text)):
-            if graf in self.html_blocks:
-                # Unhashify HTML blocks
-                grafs.append(self.html_blocks[graf])
-            else:
-                cuddled_list = None
-                if "cuddled-lists" in self.extras:
-                    # Need to put back trailing '\n' for `_list_item_re`
-                    # match at the end of the paragraph.
-                    li = self._list_item_re.search(graf + '\n')
-                    # Two of the same list marker in this paragraph: a likely
-                    # candidate for a list cuddled to preceding paragraph
-                    # text (issue 33). Note the `[-1]` is a quick way to
-                    # consider numeric bullets (e.g. "1." and "2.") to be
-                    # equal.
-                    if (li and len(li.group(2)) <= 3
-                            and (
-                                    (li.group("next_marker") and li.group("marker")[-1] == li.group("next_marker")[-1])
-                                    or
-                                    li.group("next_marker") is None
-                            )
-                    ):
-                        start = li.start()
-                        cuddled_list = self._do_lists(graf[start:]).rstrip("\n")
-                        assert re.match(r'^<(?:ul|ol).*?>', cuddled_list)
-                        graf = graf[:start]
-
-                # Wrap <p> tags.
-                graf = self._run_span_gamut(graf)
-                grafs.append("<p%s>" % self._html_class_str_from_tag('p') + graf.lstrip(" \t") + "</p>")
-
-                if cuddled_list:
-                    grafs.append(cuddled_list)
-
-        return "\n\n".join(grafs)
-
-    def _add_footnotes(self, text):
-        if self.footnotes:
-            footer = [
-                '<div class="footnotes">',
-                '<hr' + self.empty_element_suffix,
-                '<ol>',
-            ]
-
-            if not self.footnote_title:
-                self.footnote_title = "Jump back to footnote %d in the text."
-            if not self.footnote_return_symbol:
-                self.footnote_return_symbol = "&#8617;"
-
-            # self.footnotes is generated in _strip_footnote_definitions, which runs re.sub on the whole
-            # text. This means that the dict keys are inserted in order of appearance. Use the dict to
-            # sort footnote ids by that same order
-            self.footnote_ids.sort(key=lambda a: list(self.footnotes.keys()).index(a))
-            for i, id in enumerate(self.footnote_ids):
-                if i != 0:
-                    footer.append('')
-                footer.append('<li id="fn-%s">' % id)
-                footer.append(self._run_block_gamut(self.footnotes[id]))
-                try:
-                    backlink = ('<a href="#fnref-%s" ' +
-                            'class="footnoteBackLink" ' +
-                            'title="' + self.footnote_title + '">' +
-                            self.footnote_return_symbol +
-                            '</a>') % (id, i+1)
-                except TypeError:
-                    log.debug("Footnote error. `footnote_title` "
-                              "must include parameter. Using defaults.")
-                    backlink = ('<a href="#fnref-%s" '
-                        'class="footnoteBackLink" '
-                        'title="Jump back to footnote %d in the text.">'
-                        '&#8617;</a>' % (id, i+1))
-
-                if footer[-1].endswith("</p>"):
-                    footer[-1] = footer[-1][:-len("</p>")] \
-                        + '&#160;' + backlink + "</p>"
-                else:
-                    footer.append("\n<p>%s</p>" % backlink)
-                footer.append('</li>')
-            footer.append('</ol>')
-            footer.append('</div>')
-            return text + '\n\n' + '\n'.join(footer)
-        else:
-            return text
-
-    _naked_lt_re = re.compile(r'<(?![a-z/?\$!])', re.I)
-    _naked_gt_re = re.compile(r'''(?<![a-z0-9?!/'"-])>''', re.I)
-
-    def _encode_amps_and_angles(self, text):
-        # Smart processing for ampersands and angle brackets that need
-        # to be encoded.
-        text = _AMPERSAND_RE.sub('&amp;', text)
-
-        # Encode naked <'s
-        text = self._naked_lt_re.sub('&lt;', text)
-
-        # Encode naked >'s
-        # Note: Other markdown implementations (e.g. Markdown.pl, PHP
-        # Markdown) don't do this.
-        text = self._naked_gt_re.sub('&gt;', text)
-        return text
-
-    _incomplete_tags_re = re.compile(r"<(!--|/?\w+?(?!\w)\s*?.+?[\s/]+?)")
-
-    def _encode_incomplete_tags(self, text):
-        if self.safe_mode not in ("replace", "escape"):
-            return text
-
-        if text.endswith(">"):
-            return text  # this is not an incomplete tag, this is a link in the form <http://x.y.z>
-
-        def incomplete_tags_sub(match):
-            return match.group().replace('<', '&lt;')
-
-        return self._incomplete_tags_re.sub(incomplete_tags_sub, text)
-
-    def _encode_backslash_escapes(self, text):
-        for ch, escape in list(self._escape_table.items()):
-            text = text.replace("\\"+ch, escape)
-        return text
-
-    _auto_link_re = re.compile(r'<((https?|ftp):[^\'">\s]+)>', re.I)
-    def _auto_link_sub(self, match):
-        g1 = match.group(1)
-        return '<a href="%s">%s</a>' % (self._protect_url(g1), g1)
-
-    _auto_email_link_re = re.compile(r"""
-          <
-           (?:mailto:)?
-          (
-              [-.\w]+
-              \@
-              [-\w]+(\.[-\w]+)*\.[a-z]+
-          )
-          >
-        """, re.I | re.X | re.U)
-    def _auto_email_link_sub(self, match):
-        return self._encode_email_address(
-            self._unescape_special_chars(match.group(1)))
-
-    def _do_auto_links(self, text):
-        text = self._auto_link_re.sub(self._auto_link_sub, text)
-        text = self._auto_email_link_re.sub(self._auto_email_link_sub, text)
-        return text
-
-    def _encode_email_address(self, addr):
-        #  Input: an email address, e.g. "foo@example.com"
-        #
-        #  Output: the email address as a mailto link, with each character
-        #      of the address encoded as either a decimal or hex entity, in
-        #      the hopes of foiling most address harvesting spam bots. E.g.:
-        #
-        #    <a href="&#x6D;&#97;&#105;&#108;&#x74;&#111;:&#102;&#111;&#111;&#64;&#101;
-        #       x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;">&#102;&#111;&#111;
-        #       &#64;&#101;x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;</a>
-        #
-        #  Based on a filter by Matthew Wickline, posted to the BBEdit-Talk
-        #  mailing list: <http://tinyurl.com/yu7ue>
-        chars = [_xml_encode_email_char_at_random(ch)
-                 for ch in "mailto:" + addr]
-        # Strip the mailto: from the visible part.
-        addr = '<a href="%s">%s</a>' \
-               % (''.join(chars), ''.join(chars[7:]))
-        return addr
-
-    def _unescape_special_chars(self, text):
-        # Swap back in all the special characters we've hidden.
-        hashmap = tuple(self._escape_table.items()) + tuple(self._code_table.items())
-        # html_blocks table is in format {hash: item} compared to usual {item: hash}
-        hashmap += tuple(tuple(reversed(i)) for i in self.html_blocks.items())
-        while True:
-            orig_text = text
-            for ch, hash in hashmap:
-                text = text.replace(hash, ch)
-            if text == orig_text:
-                break
-        return text
-
-    def _outdent(self, text):
-        # Remove one level of line-leading tabs or spaces
-        return self._outdent_re.sub('', text)
-
-    @staticmethod
-    def _uniform_outdent(text, min_outdent=None, max_outdent=None):
-        '''
-        Removes the smallest common leading indentation from each (non empty)
-        line of `text` and returns said indent along with the outdented text.
-
-        Args:
-            min_outdent: make sure the smallest common whitespace is at least this size
-            max_outdent: the maximum amount a line can be outdented by
-        '''
-
-        # find the leading whitespace for every line
-        whitespace = [
-            re.findall(r'^[ \t]*', line)[0] if line else None
-            for line in text.splitlines()
-        ]
-        whitespace_not_empty = [i for i in whitespace if i is not None]
-
-        # if no whitespace detected (ie: no lines in code block, issue #505)
-        if not whitespace_not_empty:
-            return '', text
-
-        # get minimum common whitespace
-        outdent = min(whitespace_not_empty)
-        # adjust min common ws to be within bounds
-        if min_outdent is not None:
-            outdent = min([i for i in whitespace_not_empty if i >= min_outdent] or [min_outdent])
-        if max_outdent is not None:
-            outdent = min(outdent, max_outdent)
-
-        outdented = []
-        for line_ws, line in zip(whitespace, text.splitlines(True)):
-            if line.startswith(outdent):
-                # if line starts with smallest common ws, dedent it
-                outdented.append(line.replace(outdent, '', 1))
-            elif line_ws is not None and line_ws < outdent:
-                # if less indented than min common whitespace then outdent as much as possible
-                outdented.append(line.replace(line_ws, '', 1))
-            else:
-                outdented.append(line)
-
-        return outdent, ''.join(outdented)
-
-    @staticmethod
-    def _uniform_indent(text, indent, include_empty_lines=False, indent_empty_lines=False):
-        '''
-        Uniformly indent a block of text by a fixed amount
-
-        Args:
-            text: the text to indent
-            indent: a string containing the indent to apply
-            include_empty_lines: don't remove whitespace only lines
-            indent_empty_lines: indent whitespace only lines with the rest of the text
-        '''
-        blocks = []
-        for line in text.splitlines(True):
-            if line.strip() or indent_empty_lines:
-                blocks.append(indent + line)
-            elif include_empty_lines:
-                blocks.append(line)
-            else:
-                blocks.append('')
-        return ''.join(blocks)
-
-    @staticmethod
-    def _match_overlaps_substr(text, match, substr):
-        '''
-        Checks if a regex match overlaps with a substring in the given text.
-        '''
-        for instance in re.finditer(re.escape(substr), text):
-            start, end = instance.span()
-            if start <= match.start() <= end:
-                return True
-            if start <= match.end() <= end:
-                return True
-        return False
-
-
-class MarkdownWithExtras(Markdown):
-    """A markdowner class that enables most extras:
-
-    - footnotes
-    - fenced-code-blocks (only highlights code if 'pygments' Python module on path)
-
-    These are not included:
-    - pyshell (specific to Python-related documenting)
-    - code-friendly (because it *disables* part of the syntax)
-    - link-patterns (because you need to specify some actual
-      link-patterns anyway)
-    """
-    extras = ["footnotes", "fenced-code-blocks"]
-
-
-# ----------------------------------------------------------
-# Extras
-# ----------------------------------------------------------
-
-# Base classes
-# ----------------------------------------------------------
-
-class Extra(ABC):
-    _registry = {}
-    _exec_order: Dict[Stage, Tuple[List['Extra'], List['Extra']]] = {}
-
-    name: str
-    '''
-    An identifiable name that users can use to invoke the extra
-    in the Markdown class
-    '''
-    order: Tuple[Iterable[Union[Stage, 'Extra']], Iterable[Union[Stage, 'Extra']]]
-    '''
-    Tuple of two iterables containing the stages/extras this extra will run before and
-    after, respectively
-    '''
-
-    def __init__(self, md: Markdown, options: Optional[dict]):
-        '''
-        Args:
-            md: An instance of `Markdown`
-            options: a dict of settings to alter the extra's behaviour
-        '''
-        self.md = md
-        self.options = options if options is not None else {}
-
-    @classmethod
-    def deregister(cls):
-        '''
-        Removes the class from the extras registry and unsets its execution order.
-        '''
-        if cls.name in cls._registry:
-            del cls._registry[cls.name]
-
-        for exec_order in Extra._exec_order.values():
-            # find everywhere this extra is mentioned and remove it
-            for section in exec_order:
-                while cls in section:
-                    section.remove(cls)
-
-    @classmethod
-    def register(cls):
-        '''
-        Registers the class for use with `Markdown` and calculates its execution order based on
-        the `order` class attribute.
-        '''
-        cls._registry[cls.name] = cls
-
-        for index, item in enumerate((*cls.order[0], *cls.order[1])):
-            before = index < len(cls.order[0])
-            if not isinstance(item, Stage) and issubclass(item, Extra):
-                # eg: FencedCodeBlocks
-                for exec_orders in Extra._exec_order.values():
-                    # insert this extra everywhere the other one is mentioned
-                    for section in exec_orders:
-                        if item in section:
-                            to_index = section.index(item)
-                            if not before:
-                                to_index += 1
-                            section.insert(to_index, cls)
-            else:
-                # eg: Stage.PREPROCESS
-                Extra._exec_order.setdefault(item, ([], []))
-                if cls in Extra._exec_order[item][0 if before else 1]:
-                    # extra is already runnig after this stage. Don't duplicate that effort
-                    continue
-                if before:
-                    Extra._exec_order[item][0].insert(0, cls)
-                else:
-                    Extra._exec_order[item][1].append(cls)
-
-    @abstractmethod
-    def run(self, text: str) -> str:
-        '''
-        Run the extra against the given text.
-
-        Returns:
-            The new text after being modified by the extra
-        '''
-        ...
-
-    def test(self, text: str) -> bool:
-        '''
-        Check a section of markdown to see if this extra should be run upon it.
-        The default implementation will always return True but it's recommended to override
-        this behaviour to improve performance.
-        '''
-        return True
-
-
-class ItalicAndBoldProcessor(Extra):
-    '''
-    An ABC that provides hooks for dealing with italics and bold syntax.
-    This class is set to trigger both before AND after the italics and bold stage.
-    This allows any child classes to intercept instances of bold or italic syntax and
-    change the output or hash it to prevent it from being processed.
-
-    After the I&B stage any hashes in the `hash_tables` instance variable are replaced.
-    '''
-    name = 'italic-and-bold-processor'
-    order = (Stage.ITALIC_AND_BOLD,), (Stage.ITALIC_AND_BOLD,)
-
-    strong_re = Markdown._strong_re
-    em_re = Markdown._em_re
-
-    def __init__(self, md: Markdown, options: dict):
-        super().__init__(md, options)
-        self.hash_table = {}
-
-    def run(self, text):
-        if self.md.order < Stage.ITALIC_AND_BOLD:
-            text = self.strong_re.sub(self.sub, text)
-            text = self.em_re.sub(self.sub, text)
-        else:
-            # put any hashed values back
-            for key, substr in self.hash_table.items():
-                text = text.replace(key, substr)
-        return text
-
-    @abstractmethod
-    def sub(self, match):
-        # do nothing. Let `Markdown._do_italics_and_bold` do its thing later
-        return match.string[match.start(): match.end()]
-
-    def sub_hash(self, match):
-        substr = match.string[match.start(): match.end()]
-        key = _hash_text(substr)
-        self.hash_table[key] = substr
-        return key
-
-    def test(self, text):
-        if self.md.order < Stage.ITALIC_AND_BOLD:
-            return '*' in text or '_' in text
-        return self.hash_table and re.search(r'md5-[0-9a-z]{32}', text)
-
-# User facing extras
-# ----------------------------------------------------------
-
-
-class Admonitions(Extra):
-    '''
-    Enable parsing of RST admonitions
-    '''
-
-    name = 'admonitions'
-    order = (Stage.BLOCK_GAMUT, Stage.LINK_DEFS), ()
-
-    admonitions = r'admonition|attention|caution|danger|error|hint|important|note|tip|warning'
-
-    admonitions_re = re.compile(r'''
-        ^(\ *)\.\.\ (%s)::\ *                # $1 leading indent, $2 the admonition
-        (.*)?                                # $3 admonition title
-        ((?:\s*\n\1\ {3,}.*)+?)              # $4 admonition body (required)
-        (?=\s*(?:\Z|\n{4,}|\n\1?\ {0,2}\S))  # until EOF, 3 blank lines or something less indented
-        ''' % admonitions,
-        re.IGNORECASE | re.MULTILINE | re.VERBOSE
-    )
-
-    def test(self, text):
-        return self.admonitions_re.search(text) is not None
-
-    def sub(self, match):
-        lead_indent, admonition_name, title, body = match.groups()
-
-        admonition_type = '<strong>%s</strong>' % admonition_name
-
-        # figure out the class names to assign the block
-        if admonition_name.lower() == 'admonition':
-            admonition_class = 'admonition'
-        else:
-            admonition_class = 'admonition %s' % admonition_name.lower()
-
-        # titles are generally optional
-        if title:
-            title = '<em>%s</em>' % title
-
-        # process the admonition body like regular markdown
-        body = self.md._run_block_gamut("\n%s\n" % self.md._uniform_outdent(body)[1])
-
-        # indent the body before placing inside the aside block
-        admonition = self.md._uniform_indent(
-            '%s\n%s\n\n%s\n' % (admonition_type, title, body),
-            self.md.tab, False
-        )
-        # wrap it in an aside
-        admonition = '<aside class="%s">\n%s</aside>' % (admonition_class, admonition)
-        # now indent the whole admonition back to where it started
-        return self.md._uniform_indent(admonition, lead_indent, False)
-
-    def run(self, text):
-        return self.admonitions_re.sub(self.sub, text)
-
-
-class Breaks(Extra):
-    name = 'breaks'
-    order = (), (Stage.ITALIC_AND_BOLD,)
-
-    def run(self, text):
-        on_backslash = self.options.get('on_backslash', False)
-        on_newline = self.options.get('on_newline', False)
-
-        if on_backslash and on_newline:
-            pattern = r' *\\?'
-        elif on_backslash:
-            pattern = r'(?: *\\| {2,})'
-        elif on_newline:
-            pattern = r' *'
-        else:
-            pattern = r' {2,}'
-
-        break_tag = "<br%s\n" % self.md.empty_element_suffix
-        text = re.sub(pattern + r"\n(?!\<(?:\/?(ul|ol|li))\>)", break_tag, text)
-
-        return text
-
-
-class CodeFriendly(ItalicAndBoldProcessor):
-    '''
-    Disable _ and __ for em and strong.
-    '''
-    name = 'code-friendly'
-
-    def sub(self, match):
-        syntax = match.group(1)
-        if '_' not in syntax:
-            return super().sub(match)
-        text = match.string[match.start(): match.end()]
-        key = _hash_text(text)
-        self.hash_table[key] = text
-        return key
-
-
-class FencedCodeBlocks(Extra):
-    '''
-    Allows a code block to not have to be indented
-    by fencing it with '```' on a line before and after. Based on
-    <http://github.github.com/github-flavored-markdown/> with support for
-    syntax highlighting.
-    '''
-
-    name = 'fenced-code-blocks'
-    order = (Stage.LINK_DEFS, Stage.BLOCK_GAMUT), (Stage.PREPROCESS,)
-
-    fenced_code_block_re = re.compile(r'''
-        (?:\n+|\A\n?|(?<=\n))
-        (^[ \t]*`{3,})\s{0,99}?([\w+-]+)?\s{0,99}?\n  # $1 = opening fence (captured for back-referencing), $2 = optional lang
-        (.*?)                             # $3 = code block content
-        \1[ \t]*\n                      # closing fence
-        ''', re.M | re.X | re.S)
-
-    def test(self, text):
-        if '```' not in text:
-            return False
-        if self.md.stage == Stage.PREPROCESS and not self.md.safe_mode:
-            return True
-        if self.md.stage == Stage.LINK_DEFS and self.md.safe_mode:
-            return True
-        return self.md.stage == Stage.BLOCK_GAMUT
-
-    def _code_block_with_lexer_sub(self, codeblock, leading_indent, lexer):
-        formatter_opts = self.md.extras['fenced-code-blocks'] or {}
-
-        def unhash_code(codeblock):
-            for key, sanitized in list(self.md.html_spans.items()):
-                codeblock = codeblock.replace(key, sanitized)
-            replacements = [
-                ("&amp;", "&"),
-                ("&lt;", "<"),
-                ("&gt;", ">")
-            ]
-            for old, new in replacements:
-                codeblock = codeblock.replace(old, new)
-            return codeblock
-        # remove leading indent from code block
-        _, codeblock = self.md._uniform_outdent(codeblock, max_outdent=leading_indent)
-
-        codeblock = unhash_code(codeblock)
-        colored = self.md._color_with_pygments(codeblock, lexer,
-                                               **formatter_opts)
-
-        # add back the indent to all lines
-        return "\n%s\n" % self.md._uniform_indent(colored, leading_indent, True)
-
-    def tags(self, lexer_name) -> tuple:
-        '''
-        Returns the tags that the encoded code block will be wrapped in, based
-        upon the lexer name.
-
-        This function can be overridden by subclasses to piggy-back off of the
-        fenced code blocks syntax (see `Mermaid` extra).
-
-        Returns:
-            The opening and closing tags, as strings within a tuple
-        '''
-        pre_class = self.md._html_class_str_from_tag('pre')
-        if "highlightjs-lang" in self.md.extras and lexer_name:
-            code_class = ' class="%s language-%s"' % (lexer_name, lexer_name)
-        else:
-            code_class = self.md._html_class_str_from_tag('code')
-        return ('<pre%s><code%s>' % (pre_class, code_class), '</code></pre>')
-
-    def sub(self, match):
-        lexer_name = match.group(2)
-        codeblock = match.group(3)
-        codeblock = codeblock[:-1]  # drop one trailing newline
-
-        # Use pygments only if not using the highlightjs-lang extra
-        if lexer_name and "highlightjs-lang" not in self.md.extras:
-            lexer = self.md._get_pygments_lexer(lexer_name)
-            if lexer:
-                leading_indent = ' '*(len(match.group(1)) - len(match.group(1).lstrip()))
-                return self._code_block_with_lexer_sub(codeblock, leading_indent, lexer)
-
-        # Fenced code blocks need to be outdented before encoding, and then reapplied
-        leading_indent = ' ' * (len(match.group(1)) - len(match.group(1).lstrip()))
-        if codeblock:
-            # only run the codeblock through the outdenter if not empty
-            leading_indent, codeblock = self.md._uniform_outdent(codeblock, max_outdent=leading_indent)
-
-        codeblock = self.md._encode_code(codeblock)
-
-        tags = self.tags(lexer_name)
-
-        return "\n%s%s%s\n%s\n" % (leading_indent, tags[0], codeblock, tags[1])
-
-    def run(self, text):
-        return self.fenced_code_block_re.sub(self.sub, text)
-
-class Latex(Extra):
-    '''
-    Convert $ and $$ to <math> and </math> tags for inline and block math.
-    '''
-    name = 'latex'
-    order = (Stage.HASH_HTML,), ()
-
-    _single_dollar_re = re.compile(r'(?<!\$)\$(?!\$)(.*?)\$')
-    _double_dollar_re = re.compile(r'\$\$(.*?)\$\$', re.DOTALL)
-
-    _pre_code_block_re = re.compile(r"<pre>(.*?)</pre>", re.DOTALL)
-
-    converter = None
-    code_blocks = {}
-
-    def _convert_single_match(self, match):
-        return self.converter.convert(match.group(1))
-
-    def _convert_double_match(self, match):
-        return self.converter.convert(match.group(1).replace(r"\n", ''), display="block")
-
-    def code_placeholder(self, match):
-        #print("found match:", match, match.group(0), match.group(1))
-        placeholder = f"<!--CODE_BLOCK_{len(self.code_blocks)}-->"
-        self.code_blocks[placeholder] = match.group(0)
-        return placeholder
-
-    def run(self, text):
-        try:
-            import latex2mathml.converter
-            self.converter = latex2mathml.converter
-        except ImportError:
-            raise ImportError('The "latex" extra requires the "latex2mathml" package to be installed.')
-
-        text = self._pre_code_block_re.sub(self.code_placeholder, text)
-
-        #print("Temp Text", text)
-
-        text = self._single_dollar_re.sub(self._convert_single_match, text)
-        text = self._double_dollar_re.sub(self._convert_double_match, text)
-
-        for placeholder, code_block in self.code_blocks.items():
-            text = text.replace(placeholder, code_block)
-
-        return text
-
-
-
-
-
-class LinkPatterns(Extra):
-    '''
-    Auto-link given regex patterns in text (e.g. bug number
-    references, revision number references).
-    '''
-    name = 'link-patterns'
-    order = (Stage.LINKS,), ()
-
-    _basic_link_re = re.compile(r'!?\[.*?\]\(.*?\)')
-
-    def run(self, text):
-        link_from_hash = {}
-        for regex, repl in self.options:
-            replacements = []
-            for match in regex.finditer(text):
-                if any(self.md._match_overlaps_substr(text, match, h) for h in link_from_hash):
-                    continue
-
-                if hasattr(repl, "__call__"):
-                    href = repl(match)
-                else:
-                    href = match.expand(repl)
-                replacements.append((match.span(), href))
-            for (start, end), href in reversed(replacements):
-
-                # Do not match against links inside brackets.
-                if text[start - 1:start] == '[' and text[end:end + 1] == ']':
-                    continue
-
-                # Do not match against links in the standard markdown syntax.
-                if text[start - 2:start] == '](' or text[end:end + 2] == '")':
-                    continue
-
-                # Do not match against links which are escaped.
-                if text[start - 3:start] == '"""' and text[end:end + 3] == '"""':
-                    text = text[:start - 3] + text[start:end] + text[end + 3:]
-                    continue
-
-                # search the text for anything that looks like a link
-                is_inside_link = False
-                for link_re in (self.md._auto_link_re, self._basic_link_re):
-                    for match in link_re.finditer(text):
-                        if any((r[0] <= start and end <= r[1]) for r in match.regs):
-                            # if the link pattern start and end pos is within the bounds of
-                            # something that looks like a link, then don't process it
-                            is_inside_link = True
-                            break
-                    else:
-                        continue
-                    break
-
-                if is_inside_link:
-                    continue
-
-                escaped_href = (
-                    href.replace('"', '&quot;')  # b/c of attr quote
-                        # To avoid markdown <em> and <strong>:
-                        .replace('*', self.md._escape_table['*'])
-                        .replace('_', self.md._escape_table['_']))
-                link = '<a href="%s">%s</a>' % (escaped_href, text[start:end])
-                hash = _hash_text(link)
-                link_from_hash[hash] = link
-                text = text[:start] + hash + text[end:]
-        for hash, link in list(link_from_hash.items()):
-            text = text.replace(hash, link)
-        return text
-
-    def test(self, text):
-        return True
-
-
-class MarkdownInHTML(Extra):
-    '''
-    Allow the use of `markdown="1"` in a block HTML tag to
-    have markdown processing be done on its contents. Similar to
-    <http://michelf.com/projects/php-markdown/extra/#markdown-attr> but with
-    some limitations.
-    '''
-    name = 'markdown-in-html'
-    order = (), (Stage.HASH_HTML,)
-
-    def run(self, text):
-        def callback(block):
-            indent, block = self.md._uniform_outdent(block)
-            block = self.md._hash_html_block_sub(block)
-            block = self.md._uniform_indent(block, indent, include_empty_lines=True, indent_empty_lines=False)
-            return block
-
-        return self.md._strict_tag_block_sub(text, self.md._block_tags_a, callback, True)
-
-    def test(self, text):
-        return True
-
-
-class Mermaid(FencedCodeBlocks):
-    name = 'mermaid'
-    order = (FencedCodeBlocks,), ()
-
-    def tags(self, lexer_name):
-        if lexer_name == 'mermaid':
-            return ('<pre class="mermaid-pre"><div class="mermaid">', '</div></pre>')
-        return super().tags(lexer_name)
-
-
-class MiddleWordEm(ItalicAndBoldProcessor):
-    '''
-    Allows or disallows emphasis syntax in the middle of words,
-    defaulting to allow. Disabling this means that `this_text_here` will not be
-    converted to `this<em>text</em>here`.
-    '''
-    name = 'middle-word-em'
-    order = (CodeFriendly,), (Stage.ITALIC_AND_BOLD,)
-
-    def __init__(self, md: Markdown, options: Union[dict, bool]):
-        '''
-        Args:
-            md: the markdown instance
-            options: can be bool for backwards compatibility but will be converted to a dict
-                in the constructor. All options are:
-                - allowed (bool): whether to allow emphasis in the middle of a word.
-                    If `options` is a bool it will be placed under this key.
-        '''
-        if isinstance(options, bool):
-            options = {'allowed': options}
-        options.setdefault('allowed', True)
-        super().__init__(md, options)
-
-        self.liberal_em_re = self.em_re
-        if not options['allowed']:
-            self.em_re = re.compile(r'(?<=\b)%s(?=\b)' % self.liberal_em_re.pattern, self.liberal_em_re.flags)
-
-    def run(self, text):
-        # run strong and whatnot first
-        # this also will process all strict ems
-        text = super().run(text)
-        if self.md.order < self.md.stage:
-            # hash all non-valid ems
-            text = self.liberal_em_re.sub(self.sub_hash, text)
-        return text
-
-    def sub(self, match):
-        syntax = match.group(1)
-        if len(syntax) != 1:
-            # strong syntax
-            return super().sub(match)
-        return '<em>%s</em>' % match.group(2)
-
-    def sub_hash(self, match):
-        text = match.string[match.start(): match.end()]
-        key = _hash_text(text)
-        self.hash_table[key] = text
-        return key
-
-
-class Numbering(Extra):
-    '''
-    Support of generic counters.  Non standard extension to
-    allow sequential numbering of figures, tables, equations, exhibits etc.
-    '''
-
-    name = 'numbering'
-    order = (Stage.LINK_DEFS,), ()
-
-    def test(self, text):
-        return True
-
-    def run(self, text):
-        # First pass to define all the references
-        regex_defns = re.compile(r'''
-            \[\#(\w+) # the counter.  Open square plus hash plus a word \1
-            ([^@]*)   # Some optional characters, that aren't an @. \2
-            @(\w+)       # the id.  Should this be normed? \3
-            ([^\]]*)\]   # The rest of the text up to the terminating ] \4
-            ''', re.VERBOSE)
-        regex_subs = re.compile(r"\[@(\w+)\s*\]")  # [@ref_id]
-        counters = {}
-        references = {}
-        replacements = []
-        definition_html = '<figcaption class="{}" id="counter-ref-{}">{}{}{}</figcaption>'
-        reference_html = '<a class="{}" href="#counter-ref-{}">{}</a>'
-        for match in regex_defns.finditer(text):
-            # We must have four match groups otherwise this isn't a numbering reference
-            if len(match.groups()) != 4:
-                continue
-            counter = match.group(1)
-            text_before = match.group(2).strip()
-            ref_id = match.group(3)
-            text_after = match.group(4)
-            number = counters.get(counter, 1)
-            references[ref_id] = (number, counter)
-            replacements.append((match.start(0),
-                                 definition_html.format(counter,
-                                                        ref_id,
-                                                        text_before,
-                                                        number,
-                                                        text_after),
-                                 match.end(0)))
-            counters[counter] = number + 1
-        for repl in reversed(replacements):
-            text = text[:repl[0]] + repl[1] + text[repl[2]:]
-
-        # Second pass to replace the references with the right
-        # value of the counter
-        # Fwiw, it's vaguely annoying to have to turn the iterator into
-        # a list and then reverse it but I can't think of a better thing to do.
-        for match in reversed(list(regex_subs.finditer(text))):
-            number, counter = references.get(match.group(1), (None, None))
-            if number is not None:
-                repl = reference_html.format(counter,
-                                             match.group(1),
-                                             number)
-            else:
-                repl = reference_html.format(match.group(1),
-                                             'countererror',
-                                             '?' + match.group(1) + '?')
-            if "smarty-pants" in self.md.extras:
-                repl = repl.replace('"', self.md._escape_table['"'])
-
-            text = text[:match.start()] + repl + text[match.end():]
-        return text
-
-
-class PyShell(Extra):
-    '''
-    Treats unindented Python interactive shell sessions as <code>
-    blocks.
-    '''
-
-    name = 'pyshell'
-    order = (), (Stage.LISTS,)
-
-    def test(self, text):
-        return ">>>" in text
-
-    def sub(self, match):
-        if "fenced-code-blocks" in self.md.extras:
-            dedented = _dedent(match.group(0))
-            return self.md.extra_classes['fenced-code-blocks'].run("```pycon\n" + dedented + "```\n")
-
-        lines = match.group(0).splitlines(0)
-        _dedentlines(lines)
-        indent = ' ' * self.md.tab_width
-        s = ('\n'  # separate from possible cuddled paragraph
-             + indent + ('\n'+indent).join(lines)
-             + '\n')
-        return s
-
-    def run(self, text):
-        less_than_tab = self.md.tab_width - 1
-        _pyshell_block_re = re.compile(r"""
-            ^([ ]{0,%d})>>>[ ].*\n  # first line
-            ^(\1[^\S\n]*\S.*\n)*    # any number of subsequent lines with at least one character
-            (?=^\1?\n|\Z)           # ends with a blank line or end of document
-            """ % less_than_tab, re.M | re.X)
-
-        return _pyshell_block_re.sub(self.sub, text)
-
-
-class SmartyPants(Extra):
-    '''
-    Replaces ' and " with curly quotation marks or curly
-    apostrophes.  Replaces --, ---, ..., and . . . with en dashes, em dashes,
-    and ellipses.
-    '''
-    name = 'smarty-pants'
-    order = (), (Stage.SPAN_GAMUT,)
-
-    _opening_single_quote_re = re.compile(r"(?<!\S)'(?=\S)")
-    _opening_double_quote_re = re.compile(r'(?<!\S)"(?=\S)')
-    _closing_single_quote_re = re.compile(r"(?<=\S)'")
-    _closing_double_quote_re = re.compile(r'(?<=\S)"(?=(\s|,|;|\.|\?|!|$))')
-    # "smarty-pants" extra: Very liberal in interpreting a single prime as an
-    # apostrophe; e.g. ignores the fact that "round", "bout", "twer", and
-    # "twixt" can be written without an initial apostrophe. This is fine because
-    # using scare quotes (single quotation marks) is rare.
-    _apostrophe_year_re = re.compile(r"'(\d\d)(?=(\s|,|;|\.|\?|!|$))")
-    _contractions = ["tis", "twas", "twer", "neath", "o", "n",
-        "round", "bout", "twixt", "nuff", "fraid", "sup"]
-
-
-    def contractions(self, text):
-        text = self._apostrophe_year_re.sub(r"&#8217;\1", text)
-        for c in self._contractions:
-            text = text.replace("'%s" % c, "&#8217;%s" % c)
-            text = text.replace("'%s" % c.capitalize(),
-                "&#8217;%s" % c.capitalize())
-        return text
-
-    def run(self, text):
-        """Fancifies 'single quotes', "double quotes", and apostrophes.
-        Converts --, ---, and ... into en dashes, em dashes, and ellipses.
-
-        Inspiration is: <http://daringfireball.net/projects/smartypants/>
-        See "test/tm-cases/smarty_pants.text" for a full discussion of the
-        support here and
-        <http://code.google.com/p/python-markdown2/issues/detail?id=42> for a
-        discussion of some diversion from the original SmartyPants.
-        """
-        if "'" in text:  # guard for perf
-            text = self.contractions(text)
-            text = self._opening_single_quote_re.sub("&#8216;", text)
-            text = self._closing_single_quote_re.sub("&#8217;", text)
-
-        if '"' in text:  # guard for perf
-            text = self._opening_double_quote_re.sub("&#8220;", text)
-            text = self._closing_double_quote_re.sub("&#8221;", text)
-
-        text = text.replace("---", "&#8212;")
-        text = text.replace("--", "&#8211;")
-        text = text.replace("...", "&#8230;")
-        text = text.replace(" . . . ", "&#8230;")
-        text = text.replace(". . .", "&#8230;")
-
-        # TODO: Temporary hack to fix https://github.com/trentm/python-markdown2/issues/150
-        if "footnotes" in self.md.extras and "footnote-ref" in text:
-            # Quotes in the footnote back ref get converted to "smart" quotes
-            # Change them back here to ensure they work.
-            text = text.replace('class="footnote-ref&#8221;', 'class="footnote-ref"')
-
-        return text
-
-    def test(self, text):
-        return "'" in text or '"' in text
-
-
-class Strike(Extra):
-    '''
-    Text inside of double tilde is ~~strikethrough~~
-    '''
-    name = 'strike'
-    order = (Stage.ITALIC_AND_BOLD,), ()
-
-    _strike_re = re.compile(r"~~(?=\S)(.+?)(?<=\S)~~", re.S)
-
-    def run(self, text):
-        return self._strike_re.sub(r"<s>\1</s>", text)
-
-    def test(self, text):
-        return '~~' in text
-
-
-class Tables(Extra):
-    '''
-    Tables using the same format as GFM
-    <https://help.github.com/articles/github-flavored-markdown#tables> and
-    PHP-Markdown Extra <https://michelf.ca/projects/php-markdown/extra/#table>.
-    '''
-    name = 'tables'
-    order = (), (Stage.LISTS,)
-
-    def run(self, text):
-        """Copying PHP-Markdown and GFM table syntax. Some regex borrowed from
-        https://github.com/michelf/php-markdown/blob/lib/Michelf/Markdown.php#L2538
-        """
-        less_than_tab = self.md.tab_width - 1
-        table_re = re.compile(r'''
-                (?:(?<=\n)|\A\n?)             # leading blank line
-
-                ^[ ]{0,%d}                      # allowed whitespace
-                (.*[|].*)[ ]*\n                   # $1: header row (at least one pipe)
-
-                ^[ ]{0,%d}                      # allowed whitespace
-                (                               # $2: underline row
-                    # underline row with leading bar
-                    (?:  \|\ *:?-+:?\ *  )+  \|? \s?[ ]*\n
-                    |
-                    # or, underline row without leading bar
-                    (?:  \ *:?-+:?\ *\|  )+  (?:  \ *:?-+:?\ *  )? \s?[ ]*\n
-                )
-
-                (                               # $3: data rows
-                    (?:
-                        ^[ ]{0,%d}(?!\ )         # ensure line begins with 0 to less_than_tab spaces
-                        .*\|.*[ ]*\n
-                    )+
-                )
-            ''' % (less_than_tab, less_than_tab, less_than_tab), re.M | re.X)
-        return table_re.sub(self.sub, text)
-
-    def sub(self, match):
-        trim_space_re = '^[ \t\n]+|[ \t\n]+$'
-        trim_bar_re = r'^\||\|$'
-        split_bar_re = r'^\||(?<![\`\\])\|'
-        escape_bar_re = r'\\\|'
-
-        head, underline, body = match.groups()
-
-        # Determine aligns for columns.
-        cols = [re.sub(escape_bar_re, '|', cell.strip()) for cell in re.split(split_bar_re, re.sub(trim_bar_re, "", re.sub(trim_space_re, "", underline)))]
-        align_from_col_idx = {}
-        for col_idx, col in enumerate(cols):
-            if col[0] == ':' and col[-1] == ':':
-                align_from_col_idx[col_idx] = ' style="text-align:center;"'
-            elif col[0] == ':':
-                align_from_col_idx[col_idx] = ' style="text-align:left;"'
-            elif col[-1] == ':':
-                align_from_col_idx[col_idx] = ' style="text-align:right;"'
-
-        # thead
-        hlines = ['<table%s>' % self.md._html_class_str_from_tag('table'), '<thead%s>' % self.md._html_class_str_from_tag('thead'), '<tr>']
-        cols = [re.sub(escape_bar_re, '|', cell.strip()) for cell in re.split(split_bar_re, re.sub(trim_bar_re, "", re.sub(trim_space_re, "", head)))]
-        for col_idx, col in enumerate(cols):
-            hlines.append('  <th%s>%s</th>' % (
-                align_from_col_idx.get(col_idx, ''),
-                self.md._run_span_gamut(col)
-            ))
-        hlines.append('</tr>')
-        hlines.append('</thead>')
-
-        # tbody
-        hlines.append('<tbody>')
-        for line in body.strip('\n').split('\n'):
-            hlines.append('<tr>')
-            cols = [re.sub(escape_bar_re, '|', cell.strip()) for cell in re.split(split_bar_re, re.sub(trim_bar_re, "", re.sub(trim_space_re, "", line)))]
-            for col_idx, col in enumerate(cols):
-                hlines.append('  <td%s>%s</td>' % (
-                    align_from_col_idx.get(col_idx, ''),
-                    self.md._run_span_gamut(col)
-                ))
-            hlines.append('</tr>')
-        hlines.append('</tbody>')
-        hlines.append('</table>')
-
-        return '\n'.join(hlines) + '\n'
-
-    def test(self, text):
-        return True
-
-
-class TelegramSpoiler(Extra):
-    name = 'tg-spoiler'
-    order = (), (Stage.ITALIC_AND_BOLD,)
-
-    _tg_spoiler_re = re.compile(r"\|\|\s?(.+?)\s?\|\|", re.S)
-
-    def run(self, text):
-        return self._tg_spoiler_re.sub(r"<tg-spoiler>\1</tg-spoiler>", text)
-
-    def test(self, text):
-        return '||' in text
-
-
-class Underline(Extra):
-    '''
-    Text inside of double dash is --underlined--.
-    '''
-    name = 'underline'
-    order = (Stage.ITALIC_AND_BOLD,), ()
-
-    _underline_re = re.compile(r"(?<!<!)--(?!>)(?=\S)(.+?)(?<=\S)(?<!<!)--(?!>)", re.S)
-
-    def run(self, text):
-        return self._underline_re.sub(r"<u>\1</u>", text)
-
-    def test(self, text):
-        return '--' in text
-
-
-class Wavedrom(Extra):
-    '''
-    Support for generating Wavedrom digital timing diagrams
-    '''
-    name = 'wavedrom'
-    order = (Stage.CODE_BLOCKS, FencedCodeBlocks), ()
-
-    def test(self, text):
-        match = FencedCodeBlocks.fenced_code_block_re.search(text)
-        return match is None or match.group(2) == 'wavedrom'
-
-    def sub(self, match):
-        # dedent the block for processing
-        lead_indent, waves = self.md._uniform_outdent(match.group(3))
-        # default tags to wrap the wavedrom block in
-        open_tag, close_tag = '<script type="WaveDrom">\n', '</script>'
-
-        # check if the user would prefer to have the SVG embedded directly
-        embed_svg = self.options.get('prefer_embed_svg', True)
-
-        if embed_svg:
-            try:
-                import wavedrom
-                waves = wavedrom.render(waves).tostring()
-                open_tag, close_tag = '<div>', '\n</div>'
-            except ImportError:
-                pass
-
-        # hash SVG to prevent <> chars being messed with
-        self.md._escape_table[waves] = _hash_text(waves)
-
-        return self.md._uniform_indent(
-            '\n%s%s%s\n' % (open_tag, self.md._escape_table[waves], close_tag),
-            lead_indent, include_empty_lines=True
-        )
-
-    def run(self, text):
-        return FencedCodeBlocks.fenced_code_block_re.sub(self.sub, text)
-
-
-class WikiTables(Extra):
-    '''
-    Google Code Wiki-style tables. See
-    <http://code.google.com/p/support/wiki/WikiSyntax#Tables>.
-    '''
-    name = 'wiki-tables'
-    order = (Tables,), ()
-
-    def run(self, text):
-        less_than_tab = self.md.tab_width - 1
-        wiki_table_re = re.compile(r'''
-            (?:(?<=\n\n)|\A\n?)            # leading blank line
-            ^([ ]{0,%d})\|\|.+?\|\|[ ]*\n  # first line
-            (^\1\|\|.+?\|\|\n)*        # any number of subsequent lines
-            ''' % less_than_tab, re.M | re.X)
-        return wiki_table_re.sub(self.sub, text)
-
-    def sub(self, match):
-        ttext = match.group(0).strip()
-        rows = []
-        for line in ttext.splitlines(0):
-            line = line.strip()[2:-2].strip()
-            row = [c.strip() for c in re.split(r'(?<!\\)\|\|', line)]
-            rows.append(row)
-
-        hlines = []
-
-        def add_hline(line, indents=0):
-            hlines.append((self.md.tab * indents) + line)
-
-        def format_cell(text):
-            return self.md._run_span_gamut(re.sub(r"^\s*~", "", cell).strip(" "))
-
-        add_hline('<table%s>' % self.md._html_class_str_from_tag('table'))
-        # Check if first cell of first row is a header cell. If so, assume the whole row is a header row.
-        if rows and rows[0] and re.match(r"^\s*~", rows[0][0]):
-            add_hline('<thead%s>' % self.md._html_class_str_from_tag('thead'), 1)
-            add_hline('<tr>', 2)
-            for cell in rows[0]:
-                add_hline("<th>{}</th>".format(format_cell(cell)), 3)
-            add_hline('</tr>', 2)
-            add_hline('</thead>', 1)
-            # Only one header row allowed.
-            rows = rows[1:]
-        # If no more rows, don't create a tbody.
-        if rows:
-            add_hline('<tbody>', 1)
-            for row in rows:
-                add_hline('<tr>', 2)
-                for cell in row:
-                    add_hline('<td>{}</td>'.format(format_cell(cell)), 3)
-                add_hline('</tr>', 2)
-            add_hline('</tbody>', 1)
-        add_hline('</table>')
-        return '\n'.join(hlines) + '\n'
-
-    def test(self, text):
-        return '||' in text
-
-
-# Register extras
-Admonitions.register()
-Breaks.register()
-CodeFriendly.register()
-FencedCodeBlocks.register()
-Latex.register()
-LinkPatterns.register()
-MarkdownInHTML.register()
-MiddleWordEm.register()
-Mermaid.register()
-Numbering.register()
-PyShell.register()
-SmartyPants.register()
-Strike.register()
-Tables.register()
-TelegramSpoiler.register()
-Underline.register()
-Wavedrom.register()
-WikiTables.register()
-
-
-# ----------------------------------------------------------
-
-
-# ---- internal support functions
-
-
-def calculate_toc_html(toc):
-    """Return the HTML for the current TOC.
-
-    This expects the `_toc` attribute to have been set on this instance.
-    """
-    if toc is None:
-        return None
-
-    def indent():
-        return '  ' * (len(h_stack) - 1)
-    lines = []
-    h_stack = [0]   # stack of header-level numbers
-    for level, id, name in toc:
-        if level > h_stack[-1]:
-            lines.append("%s<ul>" % indent())
-            h_stack.append(level)
-        elif level == h_stack[-1]:
-            lines[-1] += "</li>"
-        else:
-            while level < h_stack[-1]:
-                h_stack.pop()
-                if not lines[-1].endswith("</li>"):
-                    lines[-1] += "</li>"
-                lines.append("%s</ul></li>" % indent())
-        lines.append('%s<li><a href="#%s">%s</a>' % (
-            indent(), id, name))
-    while len(h_stack) > 1:
-        h_stack.pop()
-        if not lines[-1].endswith("</li>"):
-            lines[-1] += "</li>"
-        lines.append("%s</ul>" % indent())
-    return '\n'.join(lines) + '\n'
-
-
-class UnicodeWithAttrs(str):
-    """A subclass of unicode used for the return value of conversion to
-    possibly attach some attributes. E.g. the "toc_html" attribute when
-    the "toc" extra is used.
-    """
-    metadata = None
-    toc_html = None
-
-## {{{ http://code.activestate.com/recipes/577257/ (r1)
-_slugify_strip_re = re.compile(r'[^\w\s-]')
-_slugify_hyphenate_re = re.compile(r'[-\s]+')
-def _slugify(value):
-    """
-    Normalizes string, converts to lowercase, removes non-alpha characters,
-    and converts spaces to hyphens.
-
-    From Django's "django/template/defaultfilters.py".
-    """
-    import unicodedata
-    value = unicodedata.normalize('NFKD', value).encode('utf-8', 'ignore').decode()
-    value = _slugify_strip_re.sub('', value).strip().lower()
-    return _slugify_hyphenate_re.sub('-', value)
-## end of http://code.activestate.com/recipes/577257/ }}}
-
-
-# From http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549
-def _curry(*args, **kwargs):
-    function, args = args[0], args[1:]
-    def result(*rest, **kwrest):
-        combined = kwargs.copy()
-        combined.update(kwrest)
-        return function(*args + rest, **combined)
-    return result
-
-
-# Recipe: regex_from_encoded_pattern (1.0)
-def _regex_from_encoded_pattern(s):
-    """'foo'    -> re.compile(re.escape('foo'))
-       '/foo/'  -> re.compile('foo')
-       '/foo/i' -> re.compile('foo', re.I)
-    """
-    if s.startswith('/') and s.rfind('/') != 0:
-        # Parse it: /PATTERN/FLAGS
-        idx = s.rfind('/')
-        _, flags_str = s[1:idx], s[idx+1:]
-        flag_from_char = {
-            "i": re.IGNORECASE,
-            "l": re.LOCALE,
-            "s": re.DOTALL,
-            "m": re.MULTILINE,
-            "u": re.UNICODE,
-        }
-        flags = 0
-        for char in flags_str:
-            try:
-                flags |= flag_from_char[char]
-            except KeyError:
-                raise ValueError("unsupported regex flag: '%s' in '%s' "
-                                 "(must be one of '%s')"
-                                 % (char, s, ''.join(list(flag_from_char.keys()))))
-        return re.compile(s[1:idx], flags)
-    else:  # not an encoded regex
-        return re.compile(re.escape(s))
-
-
-# Recipe: dedent (0.1.2)
-def _dedentlines(lines, tabsize=8, skip_first_line=False):
-    """_dedentlines(lines, tabsize=8, skip_first_line=False) -> dedented lines
-
-        "lines" is a list of lines to dedent.
-        "tabsize" is the tab width to use for indent width calculations.
-        "skip_first_line" is a boolean indicating if the first line should
-            be skipped for calculating the indent width and for dedenting.
-            This is sometimes useful for docstrings and similar.
-
-    Same as dedent() except operates on a sequence of lines. Note: the
-    lines list is modified **in-place**.
-    """
-    DEBUG = False
-    if DEBUG:
-        print("dedent: dedent(..., tabsize=%d, skip_first_line=%r)"\
-              % (tabsize, skip_first_line))
-    margin = None
-    for i, line in enumerate(lines):
-        if i == 0 and skip_first_line: continue
-        indent = 0
-        for ch in line:
-            if ch == ' ':
-                indent += 1
-            elif ch == '\t':
-                indent += tabsize - (indent % tabsize)
-            elif ch in '\r\n':
-                continue  # skip all-whitespace lines
-            else:
-                break
-        else:
-            continue  # skip all-whitespace lines
-        if DEBUG: print("dedent: indent=%d: %r" % (indent, line))
-        if margin is None:
-            margin = indent
-        else:
-            margin = min(margin, indent)
-    if DEBUG: print("dedent: margin=%r" % margin)
-
-    if margin is not None and margin > 0:
-        for i, line in enumerate(lines):
-            if i == 0 and skip_first_line: continue
-            removed = 0
-            for j, ch in enumerate(line):
-                if ch == ' ':
-                    removed += 1
-                elif ch == '\t':
-                    removed += tabsize - (removed % tabsize)
-                elif ch in '\r\n':
-                    if DEBUG: print("dedent: %r: EOL -> strip up to EOL" % line)
-                    lines[i] = lines[i][j:]
-                    break
-                else:
-                    raise ValueError("unexpected non-whitespace char %r in "
-                                     "line %r while removing %d-space margin"
-                                     % (ch, line, margin))
-                if DEBUG:
-                    print("dedent: %r: %r -> removed %d/%d"\
-                          % (line, ch, removed, margin))
-                if removed == margin:
-                    lines[i] = lines[i][j+1:]
-                    break
-                elif removed > margin:
-                    lines[i] = ' '*(removed-margin) + lines[i][j+1:]
-                    break
-            else:
-                if removed:
-                    lines[i] = lines[i][removed:]
-    return lines
-
-
-def _dedent(text, tabsize=8, skip_first_line=False):
-    """_dedent(text, tabsize=8, skip_first_line=False) -> dedented text
-
-        "text" is the text to dedent.
-        "tabsize" is the tab width to use for indent width calculations.
-        "skip_first_line" is a boolean indicating if the first line should
-            be skipped for calculating the indent width and for dedenting.
-            This is sometimes useful for docstrings and similar.
-
-    textwrap.dedent(s), but don't expand tabs to spaces
-    """
-    lines = text.splitlines(1)
-    _dedentlines(lines, tabsize=tabsize, skip_first_line=skip_first_line)
-    return ''.join(lines)
-
-
-class _memoized(object):
-    """Decorator that caches a function's return value each time it is called.
-    If called later with the same arguments, the cached value is returned, and
-    not re-evaluated.
-
-    http://wiki.python.org/moin/PythonDecoratorLibrary
-    """
-    def __init__(self, func):
-        self.func = func
-        self.cache = {}
-
-    def __call__(self, *args):
-        try:
-            return self.cache[args]
-        except KeyError:
-            self.cache[args] = value = self.func(*args)
-            return value
-        except TypeError:
-            # uncachable -- for instance, passing a list as an argument.
-            # Better to not cache than to blow up entirely.
-            return self.func(*args)
-
-    def __repr__(self):
-        """Return the function's docstring."""
-        return self.func.__doc__
-
-
-def _xml_oneliner_re_from_tab_width(tab_width):
-    """Standalone XML processing instruction regex."""
-    return re.compile(r"""
-        (?:
-            (?<=\n\n)       # Starting after a blank line
-            |               # or
-            \A\n?           # the beginning of the doc
-        )
-        (                           # save in $1
-            [ ]{0,%d}
-            (?:
-                <\?\w+\b\s+.*?\?>   # XML processing instruction
-                |
-                <\w+:\w+\b\s+.*?/>  # namespaced single tag
-            )
-            [ \t]*
-            (?=\n{2,}|\Z)       # followed by a blank line or end of document
-        )
-        """ % (tab_width - 1), re.X)
-_xml_oneliner_re_from_tab_width = _memoized(_xml_oneliner_re_from_tab_width)
-
-
-def _hr_tag_re_from_tab_width(tab_width):
-    return re.compile(r"""
-        (?:
-            (?<=\n\n)       # Starting after a blank line
-            |               # or
-            \A\n?           # the beginning of the doc
-        )
-        (                       # save in \1
-            [ ]{0,%d}
-            <(hr)               # start tag = \2
-            \b                  # word break
-            ([^<>])*?           #
-            /?>                 # the matching end tag
-            [ \t]*
-            (?=\n{2,}|\Z)       # followed by a blank line or end of document
-        )
-        """ % (tab_width - 1), re.X)
-_hr_tag_re_from_tab_width = _memoized(_hr_tag_re_from_tab_width)
-
-
-def _xml_escape_attr(attr, skip_single_quote=True):
-    """Escape the given string for use in an HTML/XML tag attribute.
-
-    By default this doesn't bother with escaping `'` to `&#39;`, presuming that
-    the tag attribute is surrounded by double quotes.
-    """
-    escaped = _AMPERSAND_RE.sub('&amp;', attr)
-
-    escaped = (attr
-        .replace('"', '&quot;')
-        .replace('<', '&lt;')
-        .replace('>', '&gt;'))
-    if not skip_single_quote:
-        escaped = escaped.replace("'", "&#39;")
-    return escaped
-
-
-def _xml_encode_email_char_at_random(ch):
-    r = random()
-    # Roughly 10% raw, 45% hex, 45% dec.
-    # '@' *must* be encoded. I [John Gruber] insist.
-    # Issue 26: '_' must be encoded.
-    if r > 0.9 and ch not in "@_":
-        return ch
-    elif r < 0.45:
-        # The [1:] is to drop leading '0': 0x63 -> x63
-        return '&#%s;' % hex(ord(ch))[1:]
-    else:
-        return '&#%s;' % ord(ch)
-
-
-def _html_escape_url(attr, safe_mode=False, charset=None):
-    """
-    Replace special characters that are potentially malicious in url string.
-
-    Args:
-        charset: don't escape characters from this charset. Currently the only
-            exception is for '+' when charset=='base64'
-    """
-    escaped = (attr
-        .replace('"', '&quot;')
-        .replace('<', '&lt;')
-        .replace('>', '&gt;'))
-    if safe_mode:
-        if charset != 'base64':
-            escaped = escaped.replace('+', ' ')
-        escaped = escaped.replace("'", "&#39;")
-    return escaped
-
-
-# ---- mainline
-
-class _NoReflowFormatter(argparse.RawDescriptionHelpFormatter):
-    """An argparse formatter that does NOT reflow the description."""
-    def format_description(self, description):
-        return description or ""
-
-
-def _test():
-    import doctest
-    doctest.testmod()
-
-
-def main(argv=None):
-    if argv is None:
-        argv = sys.argv
-    if not logging.root.handlers:
-        logging.basicConfig()
-
-    parser = argparse.ArgumentParser(
-        prog="markdown2", description=cmdln_desc, usage='%(prog)s [PATHS...]',
-        formatter_class=_NoReflowFormatter
-    )
-    parser.add_argument('--version', action='version',
-                        version='%(prog)s {version}'.format(version=__version__))
-    parser.add_argument('paths', nargs='*',
-                        help=(
-                            'optional list of files to convert.'
-                            'If none are given, stdin will be used'
-                        ))
-    parser.add_argument("-v", "--verbose", dest="log_level",
-                      action="store_const", const=logging.DEBUG,
-                      help="more verbose output")
-    parser.add_argument("--encoding",
-                      help="specify encoding of text content")
-    parser.add_argument("--html4tags", action="store_true", default=False,
-                      help="use HTML 4 style for empty element tags")
-    parser.add_argument("-s", "--safe", metavar="MODE", dest="safe_mode",
-                      help="sanitize literal HTML: 'escape' escapes "
-                           "HTML meta chars, 'replace' replaces with an "
-                           "[HTML_REMOVED] note")
-    parser.add_argument("-x", "--extras", action="append",
-                      help="Turn on specific extra features (not part of "
-                           "the core Markdown spec). See above.")
-    parser.add_argument("--use-file-vars",
-                      help="Look for and use Emacs-style 'markdown-extras' "
-                           "file var to turn on extras. See "
-                           "<https://github.com/trentm/python-markdown2/wiki/Extras>")
-    parser.add_argument("--link-patterns-file",
-                      help="path to a link pattern file")
-    parser.add_argument("--self-test", action="store_true",
-                      help="run internal self-tests (some doctests)")
-    parser.add_argument("--compare", action="store_true",
-                      help="run against Markdown.pl as well (for testing)")
-    parser.set_defaults(log_level=logging.INFO, compare=False,
-                        encoding="utf-8", safe_mode=None, use_file_vars=False)
-    opts = parser.parse_args()
-    paths = opts.paths
-    log.setLevel(opts.log_level)
-
-    if opts.self_test:
-        return _test()
-
-    if opts.extras:
-        extras = {}
-        for s in opts.extras:
-            splitter = re.compile("[,;: ]+")
-            for e in splitter.split(s):
-                if '=' in e:
-                    ename, earg = e.split('=', 1)
-                    try:
-                        earg = int(earg)
-                    except ValueError:
-                        pass
-                else:
-                    ename, earg = e, None
-                extras[ename] = earg
-    else:
-        extras = None
-
-    if opts.link_patterns_file:
-        link_patterns = []
-        f = open(opts.link_patterns_file)
-        try:
-            for i, line in enumerate(f.readlines()):
-                if not line.strip(): continue
-                if line.lstrip().startswith("#"): continue
-                try:
-                    pat, href = line.rstrip().rsplit(None, 1)
-                except ValueError:
-                    raise MarkdownError("%s:%d: invalid link pattern line: %r"
-                                        % (opts.link_patterns_file, i+1, line))
-                link_patterns.append(
-                    (_regex_from_encoded_pattern(pat), href))
-        finally:
-            f.close()
-    else:
-        link_patterns = None
-
-    from os.path import abspath, dirname, exists, join
-    markdown_pl = join(dirname(dirname(abspath(__file__))), "test",
-                       "Markdown.pl")
-    if not paths:
-        paths = ['-']
-    for path in paths:
-        if path == '-':
-            text = sys.stdin.read()
-        else:
-            fp = codecs.open(path, 'r', opts.encoding)
-            text = fp.read()
-            fp.close()
-        if opts.compare:
-            from subprocess import PIPE, Popen
-            print("==== Markdown.pl ====")
-            p = Popen('perl %s' % markdown_pl, shell=True, stdin=PIPE, stdout=PIPE, close_fds=True)
-            p.stdin.write(text.encode('utf-8'))
-            p.stdin.close()
-            perl_html = p.stdout.read().decode('utf-8')
-            sys.stdout.write(perl_html)
-            print("==== markdown2.py ====")
-        html = markdown(text,
-            html4tags=opts.html4tags,
-            safe_mode=opts.safe_mode,
-            extras=extras, link_patterns=link_patterns,
-            use_file_vars=opts.use_file_vars,
-            cli=True)
-        sys.stdout.write(html)
-        if extras and "toc" in extras:
-            log.debug("toc_html: " +
-                str(html.toc_html.encode(sys.stdout.encoding or "utf-8", 'xmlcharrefreplace')))
-        if opts.compare:
-            test_dir = join(dirname(dirname(abspath(__file__))), "test")
-            if exists(join(test_dir, "test_markdown2.py")):
-                sys.path.insert(0, test_dir)
-                from test_markdown2 import norm_html_from_html
-                norm_html = norm_html_from_html(html)
-                norm_perl_html = norm_html_from_html(perl_html)
-            else:
-                norm_html = html
-                norm_perl_html = perl_html
-            print("==== match? %r ====" % (norm_perl_html == norm_html))
-
-
-if __name__ == "__main__":
-    sys.exit(main(sys.argv))