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+Sun Oct 25 05:44:34 2009  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
+
+	* lib/matrix.rb (**): Optimization (up to 45% faster)
+
 Sat Oct 24 14:28:40 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* hash.c (rb_hash_set_default_proc): checks arity of defalt_proc