In some cases, "Add missing equals" code fix breaks code even further

[psfinaki]

bug.mp4

This code:

type IA<'b> = 
    abstract Foo : int -> int

type = IB<'b> = 
    inherit IA<'b>
    inherit IA<int>

This is quite an odd scenario for this diag, I guess we just shouldn't trigger it there.