Fix exception: TypeError: unsupported operand type(s) for +: 'frozenset' and 'list'
Not sure if bleach changed upstream, or if python did. But this block the test suite.
rebased onto 3ca0319cda24c9bd2997a02b9c5c0f6eb37c84b5
rebased onto dc6fa7c3117f9f65395359c5581d29127a72fcee
Pull-Request has been merged by humaton
Fix exception:
TypeError: unsupported operand type(s) for +: 'frozenset' and 'list'
Not sure if bleach changed upstream, or if python did. But this block the test suite.