Re: [PATCH] diff.c: respect diff.renames config option

Junio C Hamano [off-list ref] writes:

I am more worried about somebody who opts-in finds breakage of
commands that happen to internally use low-level diff machinery
and expect the diff machinery does not automagically do funny
rename detection without being told.
...
That is why I said I do not want this at _that_ low level.  I do
not have objections to have the configuration at a layer closer
to the UI, e.g. things in builtin-log.c and builtin-diff.c.

Upon closer look I think the revision pruning code is OK.  So
let's cook this as is in "next" and see what happens.