message: Update tf2.py
  I changed the comment symbol.('''->#)
  Because it's a line of comment.
diff: @@ -28,19 +28,19 @@ _force_enable = None
  def enable():
  - """Enables v2 behaviors."""
  + #Enables v2 behaviors.
  global _force_enable
  _force_enable = True
  def disable():
  - """Disables v2 behaviors."""
  + #Disables v2 behaviors.
  global _force_enable
  _force_enable = False
  def enabled():
  - """Returns True iff TensorFlow 2.0 behavior should be enabled."""
  + #Returns True iff TensorFlow 2.0 behavior should be enabled.
  if _force_enable is None:
  return os.getenv("TF2_BEHAVIOR", "0") != "0"
  