Rule to advise os.path.commonprefix is wrong and you should use os.path.commonpath #22981
Description
Summary
commonprefix is a string comparison, not a path comparison:
commonprefix(['/usr/lib', '/usr/local/lib']) → '/usr/l' (string prefix; not a valid directory)
commonpath(['/usr/lib', '/usr/local/lib']) → '/usr' (valid path)
If a user is importing from os.path there is a 99.99% chance they want a path function not a string function.
commonpath was added in Python 3.5 to fix this odd commonprefix behavior: python/cpython#54604