Not keyword erase sut name

[dupdob]

When one uses Not and As to rename the sut, the custom naming is lost.
As an example, this test does not generate the expected error message:

            Check.That((string) "foo")
                .As($"foo")
                .Not.IsEqualTo("foo");

gives this error message:

The checked string is equal to the given one whereas it must not.
The expected string: different from
	["foo"]

instead of:

The checked [foo] is equal to the given one whereas it must not.
The expected [foo]: different from
	["foo"]