atom/bracket-matcher — pull request #45 by boborbt (2014-06-23 16:45:10+00:00)
Title: Command for closing current tag.

Triggered with ‘cmd-alt-.’ the command finds if the cursor is in a
position where an html tag is open and not closed afterwards. If so it
inserts the corresponding closing tag at the insertion point.

Currently it activates only for html files. With minor tweaks it should work with xml as well.