[issue46286] use the new POP_JUMP_IF_NOT_NONE to simplify except* a bit

[Irit Katriel]

Change by Irit Katriel <iritkatriel at gmail.com>:


----------
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46286>
_______________________________________