edx/edx-platform — pull request #1006 by talbs (2013-09-16 21:20:48+00:00)
Title: LMS/Accounts: Switch class-based Sass @extend rules to use Sass placeholder syntax

This work aims to move any class-based (e.g. ".ui-fake-link") Sass @extend into the new placeholder (e.g. %ui-fake-link) syntax (introduced in Sass 3.2).