Weird formatting of __new__ signature in error messages

from typing import Tuple, Dict, Any


class MyMeta(type):
    def __new__(cls, name: str, bases: Tuple[type, ...], dict: Dict[str, Any]) -> type:
        return type.__new__(name, bases, dict)

This MyMeta.__new__ has exactly same signature with type.__new__ in typeshed:
https://github.com/python/typeshed/blob/master/stdlib/3/builtins.pyi#L88
But mypy thinks that it's incorrect and offers me to write two same cls args:

test.py:6: note: Possible overload variants:
test.py:6: note:     def __new__(cls, cls: Any, o: object) -> type
test.py:6: note:     def __new__(cls, cls: Any, name: str, bases: Tuple[type, ...], namespace: Dict[str, Any]) -> type

No mypy flags was used, mypy --version is 0.620

Riproduci l'esempio in test.py con mypy 0.620, quindi confronta gli overload new riportati con stdlib/3/builtins.pyi di typeshed intorno alla riga 88. Traccia il modo in cui mypy formatta la firma di type.new; il lavoro è completato quando la diagnostica non presenta più gli argomenti cls duplicati e fuorvianti, preservando al contempo le informazioni rilevanti sugli overload.