Formatter eats comments on the first argument of a function

[cknitt]

Example (tested with 11.0.1):

  external test: (
    // comment
    ~x: int,
  ) => unit = "test"

gets reformatted to

external test: (~x: int) => unit = "test"

[fhammerschmidt]

This appears to be a regression since 11.0.0

[cknitt]

Also happens for non-labeled arguments. But only for the first argument of the function.

E.g.,

  external test: (
    // comment
    int,
    // comment
    int,
  ) => unit = "test"

gets reformatted to

external test: (
  int,
  // comment
  int,
) => unit = "test"

[shulhi]

I can work on this, I wonder if it's a regression after my PR here #6615

[cknitt]

@shulhi That would be great, thanks a lot!