message: Fixed Maximum/Minimum gradient function docstring.
  Despite the docstring, in case of a tie (x == y), the gradient propagates to
  the first input rather than the second input.
diff: @@ -1594,13 +1594,13 @@ def _MaximumMinimumGrad(op, grad, selector_op):
  @ops.RegisterGradient("Maximum")
  def _MaximumGrad(op, grad):
  - """Returns grad*(x > y, x <= y) with type of grad."""
  + """Returns grad*(x >= y, x < y) with type of grad."""
  return _MaximumMinimumGrad(op, grad, math_ops.greater_equal)
  @ops.RegisterGradient("Minimum")
  def _MinimumGrad(op, grad):
  - """Returns grad*(x < y, x >= y) with type of grad."""
  + """Returns grad*(x <= y, x > y) with type of grad."""
  return _MaximumMinimumGrad(op, grad, math_ops.less_equal)
  