pkg/meta: @mustCallSuper does not understand operators?

[matanlurey]

I'd expect this to be warning free:

import 'package:meta/meta.dart';

class A {
  @mustCallSuper
  operator==(Object o) => o is A;
}

class B extends A {
  @override
  operator==(Object o) => o is B && super == o;
}

But it's not.

(The error message is also wrong, it should say does not invoke, but it says does invoke)

[natebosch]

The "does" -> "does not" has been fixed. The existed of the warning still exists.