Git 1 8 output

After updating to Ubuntu 13.04 (rotten rat|raring ringtail), a new version of git was in the system. That one corrected a grammar glitch in the `git status` output which in turn tripped up the pattern matching of git-prompt. 

Concretely, the coloring of a clean working copy is broken.

Attached, I added a few slashes and paranthesis to repair the broken coloring.