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由 Michael Haggerty 提交于
Return 0 (instead of -1) for zero-length components. Move the interpretation of zero-length components as illegal to check_refname_format(). This will make it easier to extend check_refname_format() to also check whether directory names are valid. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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