message: _init_profile_batch docstring specifies wrong return
  Existing documentation describes method as returning
  a pair of integers, while it actually sets values
  of the object attributes.
diff: @@ -2341,16 +2341,15 @@ class TensorBoard(Callback, version_utils.TensorBoardVersionSelector):
  def _init_profile_batch(self, profile_batch):
  """Validate profile_batch value and set the range of batches to profile.
  + Sets values of _start_batch and _stop_batch attributes,
  + specifying the start and stop batch to profile.
  + Setting `profile_batch=0` disables profiling.
  Args:
  profile_batch: The range of batches to profile. Should be a non-negative
  integer or a comma separated string of pair of positive integers. A pair
  of positive integers signify a range of batches to profile.
  - Returns:
  - A pair of non-negative integers specifying the start and stop batch to
  - profile.
  -
  Raises:
  ValueError: If profile_batch is not an integer or a comma seperated pair
  of positive integers.
  