JulesWang/css.vim — pull request #31 by amadeus (2013-08-18 00:50:36+00:00)
Title: Tweaks to padding/border/content-box attribute

Apparently older versions of Firefox and current versions of webkit
support a sort of `alias` for padding/border/content-box which is
simplified without the -box.

This means that padding-box == padding, and content-box == content

For more info:
https://developer.mozilla.org/en-US/docs/Web/CSS/background-origin