[issue40176] unterminated string literal tokenization error messages could be better

[Batuhan Taskaya]

Change by Batuhan Taskaya <batuhanosmantaskaya at gmail.com>:


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keywords: +patch
nosy: +BTaskaya
nosy_count: 1.0 -> 2.0
pull_requests: +18710
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19346

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40176>
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