[petsc-dev] doc errors

[Jed Brown]

On Wed, 24 Mar 2010 18:20:56 -0500, Matthew Knepley <knepley at gmail.com> 
wrote:
> I usually \mathrm for stuff like this.

AMS recommends \text for this sort of thing, but I've replace it's usage
with \mathrm.

Jed