a =
  let x = y
      z = 10
  in z

a =
  let x = y
>
      z = 10
  in z

a =
  let x = y
>
      z = 10
>
>
      z' = 10
  in z

a =
  let x = y
>
      -- Comment
      z = 10
>
      -- Comment some more
      z' = 10
  in z