[issue35755] Remove current directory from posixpath.defpath to enhance security

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

> My point is that "which" implementations have different behavior

I don't understand this point. Your example is consistent with what I saw on my Fedora 29 and the Python implementation that I just merged. Would you mind to elaborate which corner case is handled differently and describe how?

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<https://bugs.python.org/issue35755>
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