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Extend stat_tracking_info() to return +1 when branches are not equal and to take a new "enum ahead_behind_flags" argument to allow skipping the (possibly expensive) ahead/behind computation. This will be used in the next commit to allow "git status" to avoid full ahead/behind calculations for performance reasons. Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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