contrib / subtree / READMEon commit diff.c: factor advance_or_nullify out of mark_color_as_moved (e2fe6ab)
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   2Please read git-subtree.txt for documentation.
   3
   4Please don't contact me using github mail; it's slow, ugly, and worst of
   5all, redundant. Email me instead at apenwarr@gmail.com and I'll be happy to
   6help.
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   8Avery