twitter/bootstrap — pull request #7731 by ajacksified (2013-04-29 21:52:19+00:00)
Title: Get rid of -o prefixes, since Opera uses -webkit

Opera uses `-webkit-` or bare css3 selectors now, rather than `-o-`, for most uses. This gets rid of the extra `-o-` selectors. (See http://www.opera.com/docs/specs/presto2.12/css/aliases/ for more information.)