Code in Chapter 2

[KennethNye]

I think there is an error in the following code:

past_velocity = 0.0
# Constant momentum factor
momentum = 0.1
# Optimization loop
while loss > 0.01:
    w, loss, gradient = get_current_parameters()
    velocity = past_velocity * momentum - learning_rate * gradient
    w = w + momentum * velocity - learning_rate * gradient
    past_velocity = velocity
    update_parameter(w)

The line w = w + momentum * velocity - learning_rate * gradient should be just w += velocity?