[issue39717] Fix exception causes in tarfile module

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

Ethan, would you make the call on this?  My recommendation is to close because we usually don't churn APIs unless there is a demonstrable benefit.  Also, the current code reflects the dominant practice in the standard library which is both faster and more concise.

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assignee:  -> ethan.furman
nosy: +ethan.furman

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