message: Clarify docstring for tf.rank.
diff: @@ -330,7 +330,7 @@ def rank(input, name=None):
  # pylint: disable=redefined-builtin
  """Returns the rank of a tensor.
  - This operation returns an integer representing the rank of `input`.
  + Returns a 0-D `int32` `Tensor` representing the rank of `input`.
  For example:
  