Jakub Narębski <jna...@gmail.com> writes:

> I don't know if it has been fixed, but there is a difference
> between "git diff A...B" when A and B have one merge base, and
> "git diff A...B" when there are more than one merge base.
> When there is one merge base, "git diff A...B" returns simple
> unified diff equivalent to "git diff $(git merge-base A B) B".
> It is unsymmetric.
> But where there are more than one merge base, by design or by
> accident for "git diff A...B" git 1.9.2 / 1.7.4 returns
>    git diff --cc $(git merge-base --all A B) A B
> which is *symmetric*, and is combined not unified diff.

Hmph, the relevant code has not changed very much since c008c0ff
(diff A...B: give one possible diff when there are more than one
merge-base, 2010-07-12) which has been with us since v1.7.2.

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