[issue42546] copy - Allow .copy(deep=True) alongside .deepcopy() for easier usage and zen

[Steven D'Aprano]

Steven D'Aprano <steve+python at pearwood.info> added the comment:

This would be a classic example of the "Flag argument" anti-pattern:

https://www.martinfowler.com/bliki/FlagArgument.html

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nosy: +steven.daprano

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