  
          # Add in each model's views.
          for model, model_admin in six.iteritems(self._registry):
              urlpatterns += patterns('',
                  url(r'^%s/%s/' % (model._meta.app_label, model._meta.module_name),
                      include(model_admin.urls))
              )
          return urlpatterns
  
      @property
 
</s> remove         info = self.model._meta.app_label, self.model._meta.module_name
 </s> add         info = self.model._meta.app_label, self.model._meta.model_name </s> remove             "comments/%s/%s/preview.html" % (model._meta.app_label, model._meta.module_name),
 </s> add             "comments/%s/%s/preview.html" % (model._meta.app_label, model._meta.model_name), </s> remove             "comments/%s_%s_preview.html" % (model._meta.app_label, model._meta.module_name),
 </s> add             "comments/%s_%s_preview.html" % (model._meta.app_label, model._meta.model_name), </s> remove                 model=opts.object_name.lower(),
 </s> add                 model=opts.model_name, </s> remove         key = (opts.app_label, opts.object_name.lower())
 </s> add         key = (opts.app_label, opts.model_name)
                url(r'^%s/%s/' % (model._meta.app_label, model._meta.model_name),
  
          # Add in each model's views.
          for model, model_admin in six.iteritems(self._registry):
              urlpatterns += patterns('',
                url(r'^%s/%s/' % (model._meta.app_label, model._meta.model_name),
                      include(model_admin.urls))
              )
          return urlpatterns
  
      @property
keep keep keep keep replace keep keep keep keep keep
 Fixed #19689 -- Renamed `Model._meta.module_name` to `model_name`. 
django/contrib/admin/sites.py