          """
          if self.context_object_name:
              return self.context_object_name
          elif hasattr(object_list, 'model'):
              return '%s_list' % object_list.model._meta.object_name.lower()
          else:
              return None
  
      def get_context_data(self, **kwargs):
          """
 
</s> remove             return obj._meta.object_name.lower()
 </s> add             return obj._meta.model_name </s> remove             return self.field.rel.related_name or (self.opts.object_name.lower())
 </s> add             return self.field.rel.related_name or (self.opts.model_name) </s> remove                                (opts.app_label, opts.module_name),
 </s> add                                (opts.app_label, opts.model_name), </s> remove                                (opts.app_label, opts.module_name),
 </s> add                                (opts.app_label, opts.model_name), </s> remove                 self.model._meta.object_name.lower(),
 </s> add                 self.model._meta.model_name,
            return '%s_list' % object_list.model._meta.model_name
          """
          if self.context_object_name:
              return self.context_object_name
          elif hasattr(object_list, 'model'):
            return '%s_list' % object_list.model._meta.model_name
          else:
              return None
  
      def get_context_data(self, **kwargs):
          """
keep keep keep keep replace keep keep keep keep keep
 Fixed #19689 -- Renamed `Model._meta.module_name` to `model_name`. 
django/views/generic/list.py