message: Fix keras docstring format and typo for activations.py
diff: @@ -192,7 +192,7 @@ def selu(x):
  `tf.keras.layers.AlphaDropout` (not regular dropout).
  References:
  - - [backendlambauer et al., 2017](https://arxiv.org/abs/1706.02515)
  + - [Klambauer et al., 2017](https://arxiv.org/abs/1706.02515)
  """
  return nn.selu(x)
  