Linus Torvalds [off-list ref] writes:
The point being that we'd fill in a template that the committer will
hopefully edit to explain what he did to fix up the merge for each file
that had conflicts.
That is a sound idea from the point of view of good practice.
While on the topic of conflicting merge, I've been wondering if
it would make sense to do the "combined diff" between stage 2,
stage 3 and the working tree file, in addition to the --ours and
--theirs enhancements you added lately.
This would let you sanity check the merge you _could_ commit, in
the same format you would see later when you examine the merge
commit.