caskroom/homebrew-cask — pull request #7936 by rolandwalker (2014-12-09 13:46:35+00:00)
Title: add `MacOS.release` alias for `MacOS.version`

* to match phrasing in our documentation
* to distinguish against the Cask `version` (of which there may be more than one in the future)
* better fit with symbolic release names *eg* `:yosemite`
* `MacOS.release` itself is intentionally undocumented pending the next code release