mozilla/bedrock — pull request #770 by craigcook (2013-04-11 19:47:20+00:00)
Title:  Bug 797192 - some CSS fixes for plugincheck page

Somehow the columns were getting an extra 10px left margin, not sure how that was being added to the .span() mixin, but it was causing the float-drop.

Also improved responsiveness. The tables still get messy at narrow widths but I doubt this page gets much mobile traffic anyway.