code: protected String formatStreamErrorState() {
      Formatter formatter = new Formatter();
      formatter.format("TraceLogger[%s]: Stream error state = %s.", this.name, this.tracePrintStream.checkError() == true ? "bad" : "ok");
  
      return formatter.toString();
    }
docs: Gives a string representation about the error state of the {@link IndentablePrintStream} of this Tracer instance.
  
  @return a formatted status line