robbyrussell/oh-my-zsh — pull request #2138 by Profpatsch (2013-10-02 21:28:23+00:00)
Title: More expressive symbols for git and mercurial.

Idea from http://stevelosh.com/blog/2010/02/my-extravagant-zsh-prompt/

> ☿ means “I’m in a Mercurial repository.”
> ± means “I’m in a git repository.”