[issue44166] Make IndexError messages for list more informative

[Pablo Galindo Salgado]

Pablo Galindo Salgado <pablogsal at gmail.com> added the comment:

I share the same concern as Serhiy, see my comment in the PR:

https://github.com/python/cpython/pull/26207#pullrequestreview-661799899

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44166>
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