twbs/bootstrap — pull request #10700 by thisispiers (2013-09-18 13:52:55+00:00)
Title: Active progress bars can animate from left to right

+ Progress bars can animate stripes from left to right by adding 'active-right' class (tested in Chrome for Mac, Firefox for Mac, Safari, and Opera for Mac)
+ '-o-' prefix now animates from left to right with 'active' class (see lines 23 and 24)