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由 Junio C Hamano 提交于
20a16eb3 (unpack_trees(): fix diff-index regression., 2008-03-10) adjusted diff-index to the new world order since 34110cd4 (Make 'unpack_trees()' have a separate source and destination index, 2008-03-06). Callbacks are expected to return anything non-negative as "success", and instead of reporting how many index entries they have processed, they are expected to advance o->pos themselves. The code did so, but a stale comment was left behind. Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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