message: Fix an exception in part of the Term error logging.
diff: @@ -1623,7 +1623,7 @@ export class Emulator implements EmulatorApi {
  // break;
  default:
  - this.error('Unknown CSI code: %s (%i).', ch, "" + ch.charCodeAt(0));
  + this.error('Unknown CSI code: %s (%s).', ch, "" + ch.charCodeAt(0));
  break;
  }
  