message: NO-TICKET: fix test
diff: @@ -744,7 +744,7 @@ mod tests {
  let key_era_info = Key::EraInfo(42);
  assert_eq!(
  serde_json::to_string(&key_era_info).unwrap(),
  - r#"{{"EraInfo":"era-42"}}"#.to_string()
  + r#"{"EraInfo":"era-42"}"#.to_string()
  );
  }
  