[shadow] case where parsing of link markdown doesn't get it right

[trentm]

_This is a _shadow issue* for Issue 40 on Google Code (from which this project was moved).
Added 2010-06-07T19:47:12.000Z by tre...@gmail.com.
Labels: Type-Defect, Priority-Medium.
Please make updates to the bug there.*

Original description

{{{
[Editor Note (June 2010): The above link no longer exists, it redirects to an inappropriate and unrelated site. The link has been updated to the Internet Archive version. See [all archived versions of this URL](http://web.archive.org/web/*/%20http://zxw.nm.ru/test_w_upload.py.htm).]
}}}

The above para isn't parsed properly. Currently get this HTML

{{{
<p>[Editor Note (June 2010): The above link no longer exists, it redirects to an inappropriate and unrelated site. The link has been updated to the Internet Archive version. See [all archived versions of this URL](http://web.archive.org/web/*/%20http://zxw.nm.ru/test<em>w</em>upload.py.htm).]</p>
}}}