message: `name_scope('')` -> `name_scope(None)`.
diff: @@ -238,7 +238,7 @@ def _make_train_gan_model(generator_fn, discriminator_fn, real_data,
  if add_summaries:
  if not isinstance(add_summaries, (tuple, list)):
  add_summaries = [add_summaries]
  - with ops.name_scope(''):
  + with ops.name_scope(None):
  for summary_type in add_summaries:
  _summary_type_map[summary_type](gan_model)
  