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+Tue May 17 23:08:00 2016  Kenta Murata  <mrkn@mrkn.jp>
+
+	* enum.c (enum_sum): [DOC] Write documentation.
+
 Tue May 17 22:53:00 2016  Kenta Murata  <mrkn@mrkn.jp>
 
 	* enum.c (enum_sum): Implement Enumerable#sum.