Revert of Check in a simple pure-python based Markdown previewer.

third_party/Python-Markdown/markdown/extensions/smart_strong.py

-'''
-Smart_Strong Extension for Python-Markdown
-==========================================
-
-This extention adds smarter handling of double underscores within words.
-
-See <https://pythonhosted.org/Markdown/extensions/smart_strong.html>
-for documentation.
-
-Original code Copyright 2011 [Waylan Limberg](http://achinghead.com)
-
-All changes Copyright 2011-2014 The Python Markdown Project
-
-License: [BSD](http://www.opensource.org/licenses/bsd-license.php)
-
-'''
-
-from __future__ import absolute_import
-from __future__ import unicode_literals
-from . import Extension
-from ..inlinepatterns import SimpleTagPattern
-
-SMART_STRONG_RE = r'(?<!\w)(_{2})(?!_)(.+?)(?<!_)\2(?!\w)'
-STRONG_RE = r'(\*{2})(.+?)\2'
-
-
-class SmartEmphasisExtension(Extension):
-    """ Add smart_emphasis extension to Markdown class."""
-
-    def extendMarkdown(self, md, md_globals):
-        """ Modify inline patterns. """
-        md.inlinePatterns['strong'] = SimpleTagPattern(STRONG_RE, 'strong')
-        md.inlinePatterns.add(
-            'strong2',
-            SimpleTagPattern(SMART_STRONG_RE, 'strong'),
-            '>emphasis2'
-        )
-
-
-def makeExtension(*args, **kwargs):
-    return SmartEmphasisExtension(*args, **kwargs)