twittem/wp-bootstrap-navwalker — pull request #74 by NateWr (2014-02-16 15:02:37+00:00)
Title: * Adds aria-haspopup accessibility property to dropdowns

Just a small accessibility addition. The aria-haspopup property is added to the a element if the menu item has a sub-menu.

http://www.w3.org/TR/wai-aria/states_and_properties#aria-haspopup