[issue41280] lru_cache on 0-arity functions should default to maxsize=None

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


----------
pull_requests:  -20743

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41280>
_______________________________________