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+Wed Apr 17 11:38:37 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/test/unit/assertions.rb (Test::Unit::Assertions#assert):
+	  UNASSIGNED is not a valid message.
+
 Wed Apr 17 10:58:18 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* thread.c (sleep_timeval): get rid of overflow on Windows where