git-svn: cleanup: factor out longest_common_path() function
I hadn't looked at this code in a while and had to read this again to figure out what it did. To avoid having to do this again in the future, I just gave gave the hunk a descriptive name. Signed-off-by: NEric Wong <normalperson@yhbt.net> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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