Missing space before colon after function parameter

Hi!

By the example here:

```cpp
  fun mapToObjectError (result : Result(String, a)) : Result(Object.Error, a) {
    Result.mapError(result, (err: String) { Object.Error(err) })
  }
```

The `err: String` is missing a space before colon and doesn't show where:

![Image](https://github.com/user-attachments/assets/5bcb304b-68bb-4a54-96bc-8912d4e925b9)

