code: private void configureGobbler(LoggerContext ctx) {
      Logger gobblerLogger = ctx.getLogger(LOGGER_GOBBLER);
      gobblerLogger.setAdditive(false);
      gobblerLogger.addAppender(helper.newConsoleAppender(ctx, GOBBLER_PLAIN_CONSOLE, "%msg%n"));
    }
docs: Configure the logger to which logs from sub processes are written to
  (called {@link StreamGobbler#LOGGER_GOBBLER}) by {@link StreamGobbler},
  to be:
  <ol>
  <li>non additive (ie. these logs will be output by the appender of {@link StreamGobbler#LOGGER_GOBBLER} and only this one)</li>
  <li>write logs as is (ie. without any extra formatting)</li>
  <li>write exclusively to App's System.out</li>
  </ol>