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+Thu May  6 12:41:00 2010  Kenta Murata  <mrkn@mrkn.jp>
+
+	* NEWS: add rationalize methods of Complex, Float, Integer, NilClass,
+	  and Rational classes.
+
 Thu May  6 12:12:26 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* README: update.