[PATCH 3/3 V2] xfsprogs: Fix up usage() errors and omissions

[Rich Johnston]

Thanks Eric, this has been committed.

--Rich

commit 30626ef667746c51a6b93e21fc95eb5607c0002a
Author: Eric Sandeen <sandeen at sandeen.net>
Date:   Thu Apr 25 15:16:34 2013 +0000

     xfsprogs: Fix up usage() errors and omissions