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+Fri Oct 30 04:44:01 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* string.c (rb_str_sub_bang): trivial optimization.
+
 Fri Oct 30 02:11:36 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* enum.c (enum_count): call #size using rb_funcall_no_recursive()