message: fixed line-too-long error
diff: @@ -2117,12 +2117,12 @@ def add_n(inputs, name=None):
  cannot be inferred.
  """
  if not inputs or not isinstance(inputs, (list, tuple)):
  - raise ValueError("inputs must be a list of at least one Tensor/IndexedSlices"
  - "with the same dtype and shape")
  + raise ValueError("inputs must be a list of at least one"
  + "Tensor/IndexedSlices with the same dtype and shape")
  inputs = ops.convert_n_to_tensor_or_indexed_slices(inputs)
  if not all(isinstance(x, (ops.Tensor, ops.IndexedSlices)) for x in inputs):
  - raise ValueError("inputs must be a list of at least one Tensor/IndexedSlices"
  - "with the same dtype and shape")
  + raise ValueError("inputs must be a list of at least one"
  + "Tensor/IndexedSlices with the same dtype and shape")
  if len(inputs) == 1:
  if isinstance(inputs[0], ops.IndexedSlices):
  