Comments in function calls get detached from the line they are commenting on

[Niols]

As of f35eee4, Topiary formats:

foo
  first_argument (** explanation for first argument *)
  ~name: second_argument (** explanation for second argument *)
  third_argument
  result (** explanation for result *)
=  result

as

foo
  first_argument
  (** explanation for first argument *)
  ~name: second_argument
  (** explanation for second argument *)
  third_argument
  result (** explanation for result *)
= result

which I think might be a shame because it somewhat looses the connection between arguments and comments. Feel free to disregard this one, I'm not even sure what I think of it yet, but I wanted to have it showcased somewhere.

To reproduce:

$ nix run github:tweag/topiary/f35eee4 -- format -l ocaml <<EOF
foo
  first_argument (** explanation for first argument *)
  ~name: second_argument (** explanation for second argument *)
  third_argument
  result (** explanation for result *)
=  result
EOF