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+Wed Apr 11 22:31:19 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* parse.y (rb_check_id_cstr): new function to check if ID is
+	  registered with NUL-terminated C string.
+
+	* sprintf.c (rb_str_format): avoid inadvertent symbol creation.
+
 Wed Apr 11 20:28:36 2012  Hiroshi Shirosaki  <h.shirosaki@gmail.com>
 
 	* io.c (rb_io_eof): use eof() instead of io_fillbuf(). It's because