Simplify the stub content generated in views in controller specs.

Closes rspec#105.

lib/rspec/rails/view_rendering.rb

@@ -20,47 +20,30 @@ def render_views?
         end
       end
 
-      module ::ActionView
         # Delegates find_all to the submitted controller's view_paths and then
         # returns templates with modified source
-        class PathSetDelegatorResolver < Resolver
+        class PathSetDelegatorResolver < ::ActionView::Resolver
           attr_reader :path_set
 
-          def initialize(controller)
-            @controller = controller
-            @path_set = controller.class.view_paths
+          def initialize(path_set)
+            @path_set = path_set
           end
 
           def find_all(*args)
-            template_source = <<-SOURCE
-#{"*"*80}
-Template source generated by RSpec. If you prefer to render view templates
-in your specs, add render_views to the example group, like this:
-
-  describe MyController do
-    render_views
-
-Debug info:
-
-  controller: #{@controller.class}
-    resolver: #{self.class}
-        args: #{args.inspect}
-#{"*"*80}
-SOURCE
-
-            templates = @path_set.find_all(*args)
+            templates = path_set.find_all(*args)
             templates.each do |t|
-              t.singleton_class.__send__ :define_method, :source do |*|
-                template_source
+              t.singleton_class.class_eval do
+                def source
+                  "Template source generated by RSpec."
+                end
               end
             end
           end
         end
-      end
 
       included do
         before do
-          @_path_set_delegator_resolver = ::ActionView::PathSetDelegatorResolver.new(@controller)
+          @_path_set_delegator_resolver = PathSetDelegatorResolver.new(@controller.class.view_paths)
           @controller.class.view_paths = ::ActionView::PathSet.new.push(@_path_set_delegator_resolver)
         end