message: Remove whitespaces from tags in saved_model_cli.
  This currently causes tags mismatch because a leading whitespace is added
  within the saved_model_cli when doing ', '.join(tag_set).
diff: @@ -195,10 +195,10 @@ def _show_all(saved_model_dir):
  """
  tag_sets = reader.get_saved_model_tag_sets(saved_model_dir)
  for tag_set in sorted(tag_sets):
  - tag_set = ', '.join(tag_set)
  - print('\nMetaGraphDef with tag-set: \'' + tag_set +
  - '\' contains the following SignatureDefs:')
  + print("\nMetaGraphDef with tag-set: '%s' "
  + "contains the following SignatureDefs:" % ', '.join(tag_set))
  + tag_set = ','.join(tag_set)
  signature_def_map = get_signature_def_map(saved_model_dir, tag_set)
  for signature_def_key in sorted(signature_def_map.keys()):
  print('\nsignature_def[\'' + signature_def_key + '\']:')
  