thoughtbot/bourbon — pull request #516 by cganterh (2014-09-17 19:11:02+00:00)
Title: Solved error in _background.scss

Solved error: `error scss/bourbon/css3/_background.scss(Line 18: $string: #dfdfd1 is not a string for `str-slice')`.
This error happens when passing only a color to background mixin.
Like this: `@include background(#dfdfd1)`.