* lib/irb/ruby-lex.rb (identify_identifier): add '_' to the regexp.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27382 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+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.

lib/irb/ruby-lex.rb

@@ -727,7 +727,7 @@ class RubyLex
       printf "MATCH: start %s: %s\n", op, io.inspect if RubyLex.debug?
       if peek(0) =~ /[0-9]/
 	t = identify_number
-      elsif peek(0) =~ /[^\x00-\/:-@\[-`{-\x7F]/
+      elsif peek(0) =~ /[^\x00-\/:-@\[-^`{-\x7F]/
 	t = identify_identifier
       end
       printf "MATCH: end %s: %s\n", op, io.inspect if RubyLex.debug?
@@ -770,7 +770,7 @@ class RubyLex
       end
     end
 
-    while (ch = getc) =~ /[^\x00-\/:-@\[-`{-\x7F]/
+    while (ch = getc) =~ /[^\x00-\/:-@\[-^`{-\x7F]/
       print ":", ch, ":" if RubyLex.debug?
       token.concat ch
     end