New submission from Alexander Mentis :
Documentation for set/frozenset says |=, &=, -=, ^= operators do not apply to
immutable instances of frozenset. This is incorrect. These operators can be
used on frozenset; however, they behave differently on frozenset than on set.
When used with
Alexander Mentis added the comment:
I don't think you understood my bug.
That the augmented assignment operators work differently for set and frozenset
is not the issue.
The issue is that the documentation says that the |=, &=, -=, ^= operators do
not apply to immutable ins
