var flag.ErrHelp

4 uses

	flag (current package)
		flag.go#L101: var ErrHelp = errors.New("flag: help requested")
		flag.go#L1113: 			return false, ErrHelp
		flag.go#L1168: 			if err == ErrHelp {

	go.pact.im/x/plumb/internal/cli
		cli.go#L71: 		if errors.Is(err, flag.ErrHelp) {