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bpo-6689: os.path.commonpath raises ValueError for different drives isn't documented (GH-14045) 

It would raise ValueError("Paths don't have the same drive") if the paths on different drivers, which is not documented.

os.path.commonpath raises ValueError when the *paths* are in different drivers, but it is not documented.
Update the document according @Windsooon 's suggestion.
It actually raise ValueError according line 355 of [test of path](https://github.com/python/cpython/blob/master/Lib/test/test_ntpath.py)

https://bugs.python.org/issue6689
(cherry picked from commit 95492032c4)

Co-authored-by: Makdon <makdon@makdon.me>
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Miss Islington (bot) 2019-06-13 07:12:49 -07:00 committed by GitHub
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Doc/library/os.path.rst
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@ -87,9 +87,10 @@ the :mod:`glob` module.)
.. function:: commonpath(paths)
Return the longest common sub-path of each pathname in the sequence
*paths*. Raise :exc:`ValueError` if *paths* contains both absolute and relative
pathnames, or if *paths* is empty. Unlike :func:`commonprefix`, this
returns a valid path.
*paths*. Raise :exc:`ValueError` if *paths* contain both absolute
and relative pathnames, the *paths* are on the different drives or
if *paths* is empty. Unlike :func:`commonprefix`, this returns a
valid path.
.. availability:: Unix, Windows.