[issue9850] obsolete macpath module dangerously broken and should be removed

[Jessica McKellar]

Jessica McKellar added the comment:

Thanks for writing up this issue, ned.deily, and thanks for providing a patch, chortos.

I couldn't find documentation clearly specifying what the correct behavior of macpath.join should be (i.e. what are the exact rules for leading and trailing colons), but comparing the old and updated behavior against the new tests, this patch does make the function's behavior more consistent.

* The patch passes `make patchcheck`.
* The full test suite passes with this patch.

=> commit review

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keywords: +needs review
nosy: +jesstess
stage: needs patch -> commit review
versions: +Python 2.7, Python 3.5 -Python 3.3

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<http://bugs.python.org/issue9850>
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