Kevin Bullock <kbullock@ringworld.org> [Tue, 12 Feb 2013 16:05:00 +0000] rev 18687
backout: remove unnecessary dict copy
This is step 1 to remove backout's call to commands.commit. We don't use
the options again anywhere below except for backout's own purposes,
specifically choosing a merge tool, so we just write the commit options
in directly.