`formatOnType` triggers when writing `;` inside a string literal

Repro:

```dart
void reallyLongFunctionNameThatWillRecieveString(String parameter) {
  reallyLongFunctionNameThatWillRecieveString('testing that adding some chars breaks line');
}
```

If you copy the above on an 80-character line project and have `formatOnType`. Once you add a `;` anywhere inside the string literal, the formatter is triggered.