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The argument name "optional" may mislead the reader to think this option could be NULL. But it can't be. While at there, document a bit more about struct set_gitdir_args. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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