b77b02785d
This replaces a lot of code that used the result from several 2-way diffs to generate a combined diff for a merge. Now we just use git-diff-tree --cc and colorize the output a bit, which is a lot simpler, and has the enormous advantage that if the diff doesn't show quite what someone thinks it should show, I can deflect the blame to someone else. :) Signed-off-by: Paul Mackerras <paulus@samba.org>