rindex: return nil, instead of -1, if no match found.
--HG--
branch : dev
1 parent 31f5262 commit 6fe50bd3c9eace6c1ea707a7e9cefcf0372fefca
@yuuji@gentei.org yuuji@gentei.org authored on 18 Feb 2011
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yatexlib.el