Re: [PATCH 1/3] treewalk.c: Rename variable ret to cb_bits and remove some dead lines.

[Junio C Hamano <gitster@pobox.com>]

The "ret" was meant to mean "the return value we got from the
callback function", not "the return value we would give our caller".

This rename is a bit misleading in that "cb_bits == -1" does not
mean "full bits set", and it does not tell us much what these "bits"
signify.

They are used to answer this question: which one of the trees in
t[0..n] did the callback function consumed (hence needs their
pointers updated).

So perhaps call it "trees_used" or something?

By the way, our log message usually do not Capitalize the subject
after the "<area>:", i.e. do something like this instead:

    Subject: [PATCH 1/3] traverse_trees(): clarify return value of the callback

Thanks.