[PATCH] diffing between revisions

[Chris McCormick]

Hey,

This adds the ability to specify a third argument to show_diff() which
is from_revision=None which if set to some int other than None
will look up that revision to patch against. Needed so I can just wrap
cmd_diff() for the web interface. I couldn't see the right place to
write test cases for this change (but maybe I'm blind).

Best,

Chris.
-------------------
chris at mccormick.cx
http://mccormick.cx