import (...) # comment isn't reformatted

This 105-character import line doesn't get reformatted to 80 columns:
```python
from typing import (Any, Callable, Dict, List, Optional, Sequence, Text) # pylint: disable=unused-import
```

(In case you're wondering why some of the imports are unused -- this is because yapf doesn't yet support variable annotations (new in Python 3.6), so some of the typing imports appear only in `# type:` comments.)