twbs/bootstrap — pull request #12897 by avindra (2014-03-02 21:21:16+00:00)
Title: Fix for stray 1px line under top navigation

If you add an "active" class to one of the
elements in the top navigation, and style it so that active tabs have a different color, it becomes clear that there is a 1 pixel stray line under the navigation. This style fixes that.