WithBroadcastableBinOpBuilder {
  let summary = "Returns x + y element-wise.";

  let description = [{
*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.