Update to Rails 2.3.9 and itextomml 1.3.27

vendor/rails/railties/guides/rails_guides.rb

@@ -1,42 +1,31 @@
 pwd = File.dirname(__FILE__)
-$: << pwd
+$:.unshift pwd
+
+# Loading Action Pack requires rack and erubis.
+require 'rubygems'
 
 begin
+  # Guides generation in the Rails repo.
   as_lib = File.join(pwd, "../../activesupport/lib")
   ap_lib = File.join(pwd, "../../actionpack/lib")
 
-  $: << as_lib if File.directory?(as_lib)
-  $: << ap_lib if File.directory?(ap_lib)
-  
-  require "action_controller"
-  require "action_view"
+  $:.unshift as_lib if File.directory?(as_lib)
+  $:.unshift ap_lib if File.directory?(ap_lib)
 rescue LoadError
-  require 'rubygems'
+  # Guides generation from gems.
   gem "actionpack", '>= 2.3'
-
-  require "action_controller"
-  require "action_view"
 end
 
 begin
-  require 'rubygems'
   gem 'RedCloth', '>= 4.1.1'
+  require 'redcloth'
 rescue Gem::LoadError
-  $stderr.puts %(Generating Guides requires RedCloth 4.1.1+)
+  $stderr.puts('Generating guides requires RedCloth 4.1.1+.')
   exit 1
 end
 
-require 'redcloth'
-
-module RailsGuides
-  autoload :Generator, "rails_guides/generator"
-  autoload :Indexer, "rails_guides/indexer"
-  autoload :Helpers, "rails_guides/helpers"
-  autoload :TextileExtensions, "rails_guides/textile_extensions"
-end
-
+require "rails_guides/textile_extensions"
 RedCloth.send(:include, RailsGuides::TextileExtensions)
 
-if $0 == __FILE__
-  RailsGuides::Generator.new.generate
-end
+require "rails_guides/generator"
+RailsGuides::Generator.new.generate