Cleanup render_widget availability

lib/widget.rb

@@ -40,4 +40,26 @@ class Widget < ActionView::Base
   def protect_against_forgery?
     false
   end
+
+  module RenderWidgetInstanceMethods
+    def render_widget(widget, subject, options = {}, &block)
+      i = widget.new(subject)
+      if Rails.version.start_with? "3"
+        i.config = config
+        i._routes = _routes
+      else
+        i.output_buffer = ""
+      end
+      i._content_for = @_content_for
+      i.controller = respond_to? :controller ? controller : self
+      i.render_with_options(options, &block).html_safe
+    end
+  end
+end
+
+ActionView::Base.send(:include, Widget::RenderWidgetInstanceMethods)
+ActionController::Base.send(:include, Widget::RenderWidgetInstanceMethods)
+if Rails.version.start_with? "2"
+  class ::String; def html_safe; self; end; end
 end
+class ::String; def write(s); concat(s); end; end