saltstack/salt — pull request #6592 by mafrosis (2013-08-09 04:50:36+00:00)
Title: Pip amendments

* Support for the `pre_releases` parameter (`--pre` flag) in the `virtualenv.manage` state
* Added some local version checking of pip, since the `--pre` flag was added in 1.4 (the version check is localised to just the pre_release parameter for now, but someone can refactor it out later if they want to reuse it)