[issue39717] Fix exception causes in tarfile module

[Martin Panter]

Martin Panter <vadmium+py at gmail.com> added the comment:

Please don’t use “from None” in library code. It hides exceptions raised by the calling application that would help debugging. E.g. <https://bugs.python.org/issue30097#msg293185>

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nosy: +martin.panter

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<https://bugs.python.org/issue39717>
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