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+Sun Jan 18 18:32:20 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* math.c (math_atan2): revive documentation before r49220.
+	  http://d.hatena.ne.jp/nagachika/20150112/ruby_trunk_changes_49213_49226
+
 Sun Jan 18 15:57:32 2015  Seiei Higa  <hanachin@gmail.com>
 
 	* vm_method.c (check_definition): Module#public_method_defined?,