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由 Junio C Hamano 提交于
So far the last parameter to setup_revisions() was to specify the default ref when the command line did not give any (typically "HEAD"). This changes it to take a pointer to a structure so that we can add other information without touching too many codepaths in later patches. There is no functionality change. Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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