Go has an interesting take on whitespace-around-operators -- it starts removing whitespace around binary operators if there are higher precedence operators in the same expression. So, for example, you get:

    x = 2 * y
    x = 2*y + 5

This is pretty readable. In fact I think it is more readable than the usual convention of "spaces around every binary operator," but it would be untenable without the existence of gofmt. The most common argument against a convention like this is, "subtle bugs will be introduced if the actual precedence is different than the one implied by whitespace," which is why it's great to have a benevolent formatting overlord telling you when or not your formatting is consistent.