code: func addDefaultHelpSubcommands(commands []cli.Command) {
  	for i := range commands {
  		cmd := &commands[i]
  		if cmd.Subcommands != nil {
  			cmd.Subcommands = append(cmd.Subcommands, defaultSubcommandHelp)
  			addDefaultHelpSubcommands(cmd.Subcommands)
  		}
  	}
  }
docs: // addDefaultHelpSubcommand scans through defined CLI commands and adds
  // a basic help subcommand to each
  // if a help command is already defined, it will take precedence over the default.