robbyrussell/oh-my-zsh — pull request #717 by blueyed (2011-11-24 13:00:46+00:00)
Title: github plugin: only alias git=hub if `hub --version` works.

`hub` is crashing for me on a old CentOS setup with
"undefined method `shelljoin'".

On first use of the `git` function it is now checked if
`hub --version` returns successfully.