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+Thu Jun 18 23:38:07 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* thread.c (rb_thread_safe_level): fix document.  $SAFE=3 is obsolete.
+	  [ci skip]
+
 Thu Jun 18 23:25:51 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/extmk.rb: configure intersection of with-ext and not