Merge pull request #4959 from ram123naresh/removed_ordered_hash

Replaced OrderedHash with Hash for ruby 1.9 series

railties/guides/rails_guides/indexer.rb

 require 'active_support/core_ext/object/blank'
-require 'active_support/ordered_hash'
 require 'active_support/core_ext/string/inflections'
 
 module RailsGuides
@@ -21,7 +20,7 @@ def index
     def process(string, current_level=3, counters=[1])
       s = StringScanner.new(string)
 
-      level_hash = ActiveSupport::OrderedHash.new
+      level_hash = {}
 
       while !s.eos?
         re = %r{^h(\d)(?:\((#.*?)\))?\s*\.\s*(.*)$}