[issue37810] ndiff reports incorrect location when diff strings contain tabs

[Anthony Sottile]

Change by Anthony Sottile <asottile at umich.edu>:


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keywords: +patch
pull_requests: +14930
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/15201

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37810>
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