PEP 642 v3: Explicit pattern matching syntax (#1756)

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* requires that all uses of bare names be qualified with the user's intent
* ensures that all name binding operations in patterns use the as keyword
* drops alignment with iterable unpacking syntax (always requires square brackets)
* drops alignment with class instantiation syntax (defines a new dedicated instance attribute matching syntax instead)

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Nick Coghlan 2021-01-03 23:45:20 +10:00 committed by GitHub

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