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diff-tree: update stale in-code comments
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -127,9 +127,11 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
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}
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/*
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* NOTE! We expect "a ^b" to be equal to "a..b", so we
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* reverse the order of the objects if the second one
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* is marked UNINTERESTING.
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* NOTE! We expect "a..b" to expand to "^a b" but it is
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* perfectly valid for revision range parser to yield "b ^a",
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* which means the same thing. If we get the latter, i.e. the
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* second one is marked UNINTERESTING, we recover the original
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* order the user gave, i.e. "a..b", by swapping the trees.
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*/
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nr_sha1 = opt->pending.nr;
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switch (nr_sha1) {
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