AC: Update unsupported_special_methods

[corona10]

cpython/Tools/clinic/clinic.py

Lines 4230 to 4241 in 8fba952

	if fields[-1] == '__new__':
	if (self.kind != CLASS_METHOD) or (not cls):
	fail("__new__ must be a class method!")
	self.kind = METHOD_NEW
	elif fields[-1] == '__init__':
	if (self.kind != CALLABLE) or (not cls):
	fail("__init__ must be a normal method, not a class or static method!")
	self.kind = METHOD_INIT
	if not return_converter:
	return_converter = init_return_converter()
	elif fields[-1] in unsupported_special_methods:
	fail(fields[-1] + " is a special method and cannot be converted to Argument Clinic! (Yet.)")

1. AC already supports __new__ method, but the __new__ is still existed in the unsupported_special_methods
2. The reason that this code does not raise any bug is that __new__ already satisfies the first if statement, so there was no chance to meet the last if statement.
3. To prevent non-updated unsupported_special_methods, I move up the last if statement to the above of the first statement. by doing this next author can detect unsupported_special_methods is updated or not

[corona10]

Dear reviewers,
This change is intended to early detect the consistency of unsupported_special_methods.

[corona10]

@pablogsal @serhiy-storchaka @vstinner gentle ping

[vstinner]

LGTM.

[corona10]

@vstinner Thank you!