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+Thu Mar  7 08:47:42 2013  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* NEWS (Mutex#owned?): no longer experimental.
+
 Sun Mar 10 23:38:15 2013  Luis Lavena  <luislavena@gmail.com>
 
 	* win32/file.c (rb_file_expand_path_internal):  Expand home directory when