message: Update  tf.sequence_mask comment.
diff: @@ -2265,7 +2265,7 @@ def sequence_mask(lengths, maxlen=None, dtype=dtypes.bool, name=None):
  ```
  Args:
  - lengths: 1D integer tensor, all its values < maxlen.
  + lengths: 1D integer tensor, all its values <= maxlen.
  maxlen: scalar integer tensor, maximum length of each row. Default: use
  maximum over lengths.
  dtype: output type of the resulting tensor.
  