yui/yui3 — pull request #507 by prajwalit (2013-03-07 07:54:56+00:00)
Title: Fix documentation for Y.on

In case of DOM events, Y.on expects 3rd parameter to be Node instance or CSS selector string. It was mentioned in the description but not in parameter list.
It was breaking if you pass the context but not the Node in case of DOM events. Fixing the documentation to clarify this.