message: Added documentation to 2.0 tf.math.add
diff: @@ -4,5 +4,18 @@ op {
  description: <<END
  *NOTE*: `Add` supports broadcasting. `AddN` does not. More about broadcasting
  [here](http://docs.scipy.org/doc/numpy/user/basics.broadcasting.html)
  +
  +Given two input tensors, the `tf.add` operation computes the sum for every element in the tensor. Both input and output have a range `(-inf, inf)`.
  +
  +For example:
  +
  +```python
  +# `x` and `y` are tensors of shape (1)
  +x = tf.constant([1.0, -1.0, 5.0, -2.0, 0.0])
  +
  +y = tf.constant([5.0, 1.0, 3.7, -19.9, 100.0])
  +
  +tf.add(x,y) ==> [6.0, 0.0, 8.7, -21.9, 100.0] dtype = float.32
  +```
  END
  }
  