Changed expectations regarding string literals for Ruby 1.9.1

Rakefile

@@ -17,3 +17,7 @@ load "./treetop.gemspec"
 Rake::GemPackageTask.new($gemspec) do |pkg|
   pkg.need_tar = true
 end
+
+task :version do
+  puts RUBY_VERSION
+end

lib/treetop/version.rb

@@ -2,7 +2,7 @@ module Treetop #:nodoc:
   module VERSION #:nodoc:
     MAJOR = 1
     MINOR = 4
-    TINY  = 2
+    TINY  = 3
 
     STRING = [MAJOR, MINOR, TINY].join('.')
   end

spec/compiler/character_class_spec.rb

@@ -156,15 +156,17 @@ module ModFoo
     end
   end
 
-  describe "A character class containing a \\M- meta-char escape" do
-    slash = "\\"
-    testing_expression "[#{slash}M- ]"
-    it "matches that character only" do
-      parse("\240").should_not be_nil
-      parse('\\').should be_nil
-      parse('M').should be_nil
-      parse('-').should be_nil
-      parse(' ').should be_nil
+  if RUBY_VERSION =~ /\A1\.8\./
+    describe "A character class containing a \\M- meta-char escape" do
+      slash = "\\"
+      testing_expression "[#{slash}M- ]"
+      it "matches that character only" do
+        parse("\240").should_not be_nil
+        parse('\\').should be_nil
+        parse('M').should be_nil
+        parse('-').should be_nil
+        parse(' ').should be_nil
+      end
     end
   end