lib/classes/CLI.js/CLI/displayHelp
class CLI:  displayHelp(processedInput) {
    const commands = processedInput.commands;
    const options = processedInput.options;

    // if only "version" or "v" was entered
    if ((commands.length === 0 && (options.version || options.v)) ||
        (commands.length === 1 && (commands.indexOf('version') > -1))) {
      this.getVersionNumber();
      return true;
    }

    // if only "help" or "h" was entered
    if ((commands.length === 0) ||
        (commands.length === 0 && (options.help || options.h)) ||
        (commands.length === 1 && (commands.indexOf('help') > -1))) {
      this.generateMainHelp();
      return true;
    }

    // if "help" was entered in combination with commands (or one command)
    if (commands.length >= 1 && (options.help || options.h)) {
      this.generateCommandsHelp(commands);
      return true;
    }
    return false;
  }