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+Mon Feb  9 11:31:09 2009  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* io.c (io_encoding_set): ignore second argument when external and
+	  internal are same. [ruby-dev:37939]
+
 Mon Feb  9 09:05:12 2009  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket/option.c (inspect_local_peercred): check version.