trentm/python-markdown2 — pull request #160 by mastak (2014-05-20 13:41:29+00:00)
Title: avoid markdown <em> and <strong> in link title

and is avoide in link href but not in link title.

So url like http://foo.com/blah_blah_blah/123 would be:

http://foo.com/blahblahblah/123

I think link title must be avoid markdown and .