John Snow writes:
> This is a minor adjustment that allows the 'required' and 'optional'
> keys fields to take a default value of an empty, immutable sequence (the
> empty tuple).
Quite marginal, but simple enough for me not to say no to it.
> This reveals a quirk of this function, which is tha
This is a minor adjustment that allows the 'required' and 'optional'
keys fields to take a default value of an empty, immutable sequence (the
empty tuple).
This reveals a quirk of this function, which is that "a + b" is
list-specific behavior. We can accept a wider variety of types if we
avoid tha
