message: Minor doc enhancement in CheckpointSaverHook
diff: @@ -404,7 +404,7 @@ class CheckpointSaverHook(session_run_hook.SessionRunHook):
  Raises:
  ValueError: One of `save_steps` or `save_secs` should be set.
  - ValueError: At most one of saver or scaffold should be set.
  + ValueError: At most one of `saver` or `scaffold` should be set.
  """
  logging.info("Create CheckpointSaverHook.")
  if saver is not None and scaffold is not None:
  