[issue444582] Finding programs in PATH, adding shutil.which

[Brian Curtin]

Brian Curtin <brian at python.org> added the comment:

> I don't really understand why you call abspath(). If the caller wants an absolute path, they can call abspath() themselves.

Because that is what `which` does.

I just pushed the change before I saw this message, so it went in as the patch shows. Do you want this changed?

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