fabric/fabric — pull request #1025 by dongweiming (2013-11-28 03:05:05+00:00)
Title: bugfix when use osx "no such option: --with-color"

When i want to test fab with `fab test` on OSX 18.5, display this:

```
$cd fabric
Usage: fab [options]

fab: error: no such option: --with-color
```

But on centos and ubuntu it's works. but i do not kown why, so i think when osx, i do not add '--with-color'