ruff and black disagree on `.pyi` format for one line `def`

```python
class DummyClass:
    @staticmethod
    def get_42() -> int: ...
```

ruff gives `test-crates/pyo3-pure/pyo3_pure.pyi:3:5: E704 Multiple statements on one line (def)` while black formats it back to one line if you change it to

```python
class DummyClass:
    @staticmethod
    def get_42() -> int:
        ...
```