Change Details

[This edit](https://en.wikipedia.org/w/index.php?title=Wikipedia%3AFeatured_article_candidates%2FJosh_Hutcherson%2Farchive2&diff=636494783&oldid=636368442) didn't trigger a mention-notification because the sender's signature only contains a link to their usertalkpage. Many users redirect their userpage directly to their usertalkpage, and some of those users also change their signature to only link to the usertalkpage. The Mention-Notifications system should recognize these signatures.