twbs/bootstrap — pull request #14311 by hnrch02 (2014-08-04 04:20:21+00:00)
Title: Follow-up to #13074: use spec syntax instead of deprecated mixins

Refs #13074 and https://github.com/twbs/bootstrap/commit/c7970106a2c8edaac46b7bfa4e02aed10971a400#commitcomment-7249462