app/assets/stylesheets/library/_micro-clearfix.sass
/**
* Based on the micro clearfix hack, doesn't use overflow: hidden.
* http://nicolasgallagher.com/micro-clearfix-hack/
=micro-clearfix
/* For modern browsers
&:before,
&:after
content: ""
display: table
&:after
clear: both
/* For IE 6/7 (trigger hasLayout)
&
zoom: 1