It is putting <em> inside urls with double underscores

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Try a URL like http://derp.com?__test=1

What is the expected output? What do you see instead?

A link with the proper not a url. Instead there's an <em> in the url.

Original issue reported on code.google.com by [email protected] on 12 Nov 2012 at 9:20