couple small xfstest patches

[Christoph Hellwig]

On Mon, Dec 22, 2008 at 08:55:20AM -0600, Eric Sandeen wrote:
> Christoph Hellwig wrote:
> > On Fri, Nov 21, 2008 at 01:45:23PM -0800, Matthew Kent wrote:
> >> * 189 fails with external devices
> >> * add a unified diff output option, find it easier on the eyes ;)
> > 
> > Thanks, I'll put these into my queue.  Question to the list:  any
> > arguments against just making unified diffs the default for xfsqa
> > output?
> 
> none here; I run patched that way already.

Given that no one else complained I'll make it the default.