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+Wed Sep 23 21:25:20 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/bigdecimal/lib/bigdecimal/math.rb (atan): refined.
+
 Wed Sep 23 17:08:30 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* parse.y (assign_in_cond): also should warn assignment to dvar in