Added markdown parsing for comments so links in comments now appear properly.

Also rewrote part of the HTML rewriting code so it doesn't introduce an additional wrapping element in the output which was added due to a html5lib requirements on input.

python/packages/markdown/extensions/nl2br.py

@@ -0,0 +1,36 @@
+"""
+NL2BR Extension
+===============
+
+A Python-Markdown extension to treat newlines as hard breaks; like
+GitHub-flavored Markdown does.
+
+Usage:
+
+    >>> import markdown
+    >>> print markdown.markdown('line 1\\nline 2', extensions=['nl2br'])
+    <p>line 1<br />
+    line 2</p>
+
+Copyright 2011 [Brian Neal](http://deathofagremmie.com/)
+
+Dependencies:
+* [Python 2.4+](http://python.org)
+* [Markdown 2.1+](http://packages.python.org/Markdown/)
+
+"""
+
+import markdown
+
+BR_RE = r'\n'
+
+class Nl2BrExtension(markdown.Extension):
+
+    def extendMarkdown(self, md, md_globals):
+        br_tag = markdown.inlinepatterns.SubstituteTagPattern(BR_RE, 'br')
+        md.inlinePatterns.add('nl', br_tag, '_end')
+
+
+def makeExtension(configs=None):
+    return Nl2BrExtension(configs)
+