message: Getting rid of spurious comma
diff: @@ -64,7 +64,7 @@ impl Display for Event {
  fn fmt(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
  match self {
  Event::Initialize => {
  - write!(formatter, "initialize",)
  + write!(formatter, "initialize")
  }
  Event::Request(req) => write!(formatter, "chainspec_loader request: {}", req),
  Event::CheckForNextUpgrade => {
  