jquery/jquery-ui — pull request #1259 by ijcheung (2014-06-02 19:15:04+00:00)
Title: Tooltip: Preserve changes to title attribute on close

Follow up to the [#8925](http://bugs.jqueryui.com/ticket/8925) fix.
Adds the ability to clear a tooltip by setting the title attribute to an empty string.
Also see: [forum link](https://forum.jquery.com/topic/tooltip-removeattr-title-for-ie)