message: Remove semicolon from doc! expansion
diff: @@ -61,7 +61,7 @@ macro_rules! doc(
  };
  // if there is a trailing comma retry with the trailing comma stripped.
  ($($field:expr => $value:expr),+ ,) => {
  - doc!( $( $field => $value ), *);
  + doc!( $( $field => $value ), *)
  };
  );
  