sass/libsass — pull request #658 by xzyfer (2014-11-19 06:05:11+00:00)
Title: Add support for the not expression

This PR adds support for the `not` expression. I'm not sure if this covers all the bases but it works for conditionals and passes the associated spec. At the very least it's a incremental improvement.

Fixes https://github.com/sass/libsass/issues/368. Specs added https://github.com/sass/sass-spec/pull/14.