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+Tue Oct 27 21:20:35 2009  Hidetoshi NAGAI  <nagai@ai.kyutech.ac.jp>
+
+	* ext/tk/lib/tk/variable.rb: add TkVariable#+@ and -@ method.
+
 Tue Oct 27 16:36:52 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* string.c (chopped_length): get rid of unexpected exception.