message: Fix typo in doc strings
diff: @@ -160,7 +160,7 @@ def enable_v2_behavior():
  @tf_export(v1=["disable_v2_behavior"])
  def disable_v2_behavior():
  - """Enables TensorFlow 2.x behaviors.
  + """Disables TensorFlow 2.x behaviors.
  This function can be called at the beginning of the program (before `Tensors`,
  `Graphs` or other structures have been created, and before devices have been
  