Python 3.11 deprecation warning: 'pipes' is deprecated and slated for removal in Python 3.13

[adamchainz]

Running the tests for my plugin tox-py on Python 3.11b1 with tox 3.25.0, this warning is emitted:

tests/test_integration.py:8: in <module>
    import tox
.tox/py311/lib/python3.11/site-packages/tox/__init__.py:11: in <module>
    from . import exception
.tox/py311/lib/python3.11/site-packages/tox/exception.py:2: in <module>
    import pipes
/opt/hostedtoolcache/Python/3.11.0-beta.1/x64/lib/python3.11/pipes.py:68: in <module>
    warnings._deprecated(__name__, remove=(3, 13))
/opt/hostedtoolcache/Python/3.11.0-beta.1/x64/lib/python3.11/warnings.py:514: in _deprecated
    warn(msg, DeprecationWarning, stacklevel=3)
E   DeprecationWarning: 'pipes' is deprecated and slated for removal in Python 3.13

I checked and the rewrite branch doesn't use pipes, so not sure if this is worth actioning. I'm ignoring it in my test suite for now.

[adamchainz]

Ah, checking on master reveals that only pipes.quote() is used... but that's just an alias for shlex.quote():

https://github.com/python/cpython/blob/ffcc7cd57f6a52c6074ecc9f0a9f0177fb1dbfee/Lib/pipes.py#L64-L66

Seems trivial to fix then.