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+Fri Aug 27 12:47:44 2010  Kenta Murata  <mrkn@mrkn.jp>
+
+	* math.c (math_atan2): change the behavior when x and y are zero.
+
+	* test/ruby/test_math.rb (test_atan2): add tests for the above
+	  changes.
+
 Fri Aug 27 12:26:23 2010  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* object.c (rb_obj_class): remove mention of obsolete method.