_overload_dummy raises NotImplementedError, not RuntimeError

[sobolevn]

Source:

cpython/Lib/typing.py

Lines 2536 to 2542 in eae7dad

	def _overload_dummy(*args, **kwds):
	"""Helper for @overload to raise when called."""
	raise NotImplementedError(
	"You should not call an overloaded function. "
	"A series of @overload-decorated functions "
	"outside a stub module should always be followed "
	"by an implementation that is not @overload-ed.")

I've found this while looking for implicit abstract classes / methods in CPython.

Test was checking for RuntimeError, it is technically correct:

>>> NotImplementedError.__mro__
(<class 'NotImplementedError'>, <class 'RuntimeError'>, <class 'Exception'>, <class 'BaseException'>, <class 'object'>)

But, we can be more precise. It is a good thing.
I am going to skip creating an issue for this, it is like a typo-fix :)