autolink_url fails and autolink_www takes over when text runs into link

[spladug]

This text has a lack of spaceshttp://www.google.com

renders as

<p>This text has a lack of spaceshttp://<a href="http://www.google.com">www.google.com</a></p>

rather than

<p>This text has a lack of spaces<a href="http://www.google.com">http://www.google.com</a></p>

[vmg]

Do we really want to match that? No other autolinking algorithm does it -- I guess because it looks ugly as hell.

[spladug]

This came from the testing against reddit's discount, so discount does this at least. I agree it's ugly, but the current rendered output is somewhat confusing to an end user.