Indents allow you to open Mod in

Is there a way to get this kind of layout from TypeRex?

let alert ctx x = 
  let open Alert in
  Printf.printf "...Alert: type = %s, status = %s\n"
    (Type.to_string (type_ x)) (status x);
  flush stdout

In the end, I get this instead of what seems to me suboptimal

let alert ctx x = 
  let open Alert in
      Printf.printf "...Alert: type = %s, status = %s\n"
        (Type.to_string (type_ x)) (status x);
      flush stdout