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This came up in #16515.
While using PyArg_UnpackTuple to parse the positional arguments in a function that receives both positional and keyword arguments, the error message returned when the number of arguments is incorrect is misleading, e.g.:
>>> max(foo=1)
TypeError: max expected 1 arguments, got 0
This can be fixed by adding "positional" before "arguments" in the error message. The attached patch fixes this and the pluralization of "argument(s)".