avoid adding space on // comments?

its a special case but in jbang I use `//JAVA` , `//DEPS` etc as special markers.

I tried using @formatter:off but seem to have no effect.

```
///usr/bin/env jbang "$0" "$@" ; exit $?
// @formatter:off
//JAVA 21+
//PREVIEW
//DEPS org.imgscalr:imgscalr-lib:4.2

class test {

}
```

gets turned into:

```
/// usr/bin/env jbang "$0" "$@" ; exit $?
// @formatter:off
// JAVA 21+
// PREVIEW
// DEPS org.imgscalr:imgscalr-lib:4.2
```

the first line is a case of #1218 but the others below - how does one tell google-java-format not to mess with those?