[issue31506] Improve the error message logic for object_new & object_init

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

Paolo: it still won't be completely clear, since there's still the subtle issue that __new__ is a static method rather than a class method, so the correct calls up to the base class are respectively:

    super(Singleton, cls).__new__(cls) # Static method, cls needs to be passed explicitly

    super(Singleton, self).__init__() # Bound method, self filled in automatically

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31506>
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