rescript format sometimes deletes comments

[Minnozz]

I think this happens when the body of a match arm is a block:

switch true {
// This comment disappears when you format this file
| true => {
    let _ = 123
    Js.Console.log("Must be block")
  }
| _ => ()
}

Testcase on Playground

[Minnozz]

Another case where a comment is removed:

type foo = [
  | #Bar // This comment is removed by formatting
  | #Baz
]

Testcase on Playground

[cknitt]

Fixed in #510 and #552.