message: Add missing trailing commas to grammar
diff: @@ -93,7 +93,7 @@ pub Declaration: Declaration = {
  <start: @L> <recovered: !> <end: @R> ";" => {
  errors.push(super::errors::from_lalrpop(filemap, recovered.error));
  Declaration::Error(ByteSpan::new(start, end))
  - }
  + },
  };
  Exposing : Exposing = {
  @@ -174,7 +174,7 @@ AtomicTerm: Term = {
  <start: @L> <recovered: !> <end: @R> => {
  errors.push(super::errors::from_lalrpop(filemap, recovered.error));
  Term::Error(ByteSpan::new(start, end))
  - }
  + },
  };
  AtomicLamParam: (Vec<(ByteSpan, String)>, Option<Box<Term>>) = {
  