Upgrade to Rails 2.2.0

As a side benefit, fix an (non-user-visible) bug in display_s5().
Also fixed a bug where removing orphaned pages did not expire cached summary pages.

vendor/rails/actionpack/lib/action_view/test_case.rb

@@ -25,9 +25,7 @@ module ActionView
       end
     end
 
-    ActionView::Base.helper_modules.each do |helper_module|
-      include helper_module
-    end
+    include ActionView::Helpers
     include ActionController::PolymorphicRoutes
     include ActionController::RecordIdentifier
 
@@ -37,6 +35,8 @@ module ActionView
       if helper_class && !self.class.ancestors.include?(helper_class)
         self.class.send(:include, helper_class)
       end
+
+      self.output_buffer = ''
     end
 
     class TestController < ActionController::Base
@@ -48,10 +48,13 @@ module ActionView
       end
     end
 
+    protected
+      attr_accessor :output_buffer
+
     private
       def method_missing(selector, *args)
         controller = TestController.new
-        return controller.send!(selector, *args) if ActionController::Routing::Routes.named_routes.helpers.include?(selector)
+        return controller.__send__(selector, *args) if ActionController::Routing::Routes.named_routes.helpers.include?(selector)
         super
       end
   end