[issue40050] importlib: module.__spec__ leaks importlib namespaces (test_importlib leaked xxx references)

[STINNER Victor]

Change by STINNER Victor <vstinner at python.org>:


----------
pull_requests: +18496
pull_request: https://github.com/python/cpython/pull/19135

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40050>
_______________________________________