[issue43478] Disallow Mock spec arguments from being Mocks

[STINNER Victor]

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


----------
nosy: +vstinner
nosy_count: 9.0 -> 10.0
pull_requests: +24071
pull_request: https://github.com/python/cpython/pull/25227

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43478>
_______________________________________