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+Sun Apr 18 02:13:59 2010  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* lib/irb/ruby-lex.rb (identify_identifier): add '_' to the regexp.
+
 Sat Apr 17 23:21:15 2010  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* configure.in: use AC_TRY_LINK instead of AC_TRY_COMPILE.