Bad handling of markdown links

[gavinwahl]

Given the markdown <google.com>, I expect output of either <google.com> or <a href="http://google.com">google.com</a>, but instead the output is <p><google.com></google.com></p>

This is because markdown isn't recognizing google as a link, so it outputs it as-is. Bleach thinks it's a tag, so it gets closed and entitized.