Another one that will fail is a simple operator.

```
    it 'accepts operator with a hash parameter with braces' do
      inspect_source(cop, ['x.z - { y: "z" }'])
      expect(cop.messages).to be_empty
      expect(cop.highlights).to be_empty
    end
```

```
(send
  (send
    (send nil :x) :z) :-
  (hash
    (pair
      (sym :y)
      (str "z"))))
(send
  (send nil :x) :z)
(send nil :x)
```