An extra newline is unexpectedly inserted after a `dslx-fmt::on` comment

Format:

```
import thing1;
import thing2;

fn f() -> (u32, u16) {
let y = u16:64;

// dslx-fmt::off
let y = u16:64;
let x =
u32:41;
(x , y)

// dslx-fmt::on

}
```

inserts the extra newline after the `::on`.