borisyankov/DefinitelyTyped — pull request #1997 by JoshStrobl (2014-04-06 22:51:18+00:00)
Title: jQuery.d.ts .on() declaration addition

According to http://api.jquery.com/on/, .on() has:
1. required events
2. optional selector
3. optional data
4. handler

Prior to this commit, you were allowed to call .on() with data added, but only if you added the optional (not required) selector. This commit allows you to call .on(events, data, handler) as allowed by jQuery.