New option for hanging indent

Is it possible to add an option for a custom hanging intent spacing in `fprettify`? Currently,
```Fortran
   output = def( &
        input1, &
        input2, &
        input3)
```
gets converted to
```Fortran
   output = def( &
            input1, &
            input2, &
            input3)
```
but I’d really like to preserve the original indentation.