thoughtbot/bitters — pull request #140 by kylefiedler (2014-12-18 14:51:53+00:00)
Title: Remove extends

Articles like http://www.sitepoint.com/avoid-sass-extend/ and http://csswizardry.com/2014/11/when-to-use-extend-when-to-use-a-mixin/ explain why we should only be using the Bourbon mixin instead of extends for clearfix and hide-text. I felt the separation for buttons was superfluous.