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+Tue Sep 23 17:50:35 2008  Koichi Sasada  <ko1@atdot.net>
+
+	* thread.c (rb_thread_blocking_region): write a document
+
 Tue Sep 23 17:14:31 2008  Koichi Sasada  <ko1@atdot.net>
 
 	* thread.c, include/ruby/intern.h (rb_thread_interrupted): added.