[issue18819] tarfile fills devmajor and devminor fields even for non-devices

[William Chargin]

Change by William Chargin <wchargin at gmail.com>:


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pull_requests: +17472
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18080

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue18819>
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