[issue39374] Key in sort -> Callable Object instead of function

[Roundup Robot]

Change by Roundup Robot <devnull at psf.upfronthosting.co.za>:


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keywords: +patch
pull_requests: +17560
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18177

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39374>
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