message: Add a testable example to tf.math.log1p
diff: @@ -7,4 +7,13 @@ op {
  name: "log1p"
  deprecation_version: 2
  }
  + description: <<END
  +I.e., \\(y = \log_e (1 + x)\\).
  +
  +Example:
  +>>> x = tf.constant([0, 0.5, 1, 5])
  +>>> tf.math.log1p(x)
  +<tf.Tensor: shape=(4,), dtype=float32, numpy=array([0. , 0.4054651, 0.6931472, 1.7917595], dtype=float32)>
  +
  +END
  }
  