[issue31417] Use the enumerate function where appropriate

[R. David Murray]

R. David Murray added the comment:

Anyone who uses stdlib code as examples of best practice doesn't understand the history of stdlib code.

Generally, we consider the danger of introducing bugs to be more significant than the benefit of the "cleanup" changes.  The fact that you are discussing further changes to the code in the PR make this more likely.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31417>
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