It’s been pointed out to me before that:

the two ways of spacing the em dash on that quote is a joke about how it's not actually possible to do that? (And there's a third way in another line of the zen)

Do I buy it? Not sure. But apparently there’s more to this line than what it suggests.

This is not only the main reason Python turned me off, they can't even stick to it with their umpteen package managers, which is hypocrisy