Further monkey-patching to avoid deprecation warnings

railties/lib/rails/tasks/documentation.rake

@@ -8,6 +8,8 @@ end
 
 # Monkey-patch to remove redoc'ing and clobber descriptions to cut down on rake -T noise
 class RDocTaskWithoutDescriptions < RDoc::Task
+  include ::Rake::DSL
+
   def define
     task rdoc_task_name