-minussign:*:21:root
# Next line is invalid (empty group name)
:*:22:root

daemon:*:1:root
    indented:*:7:root
# comment:*:4:found
     # comment:*:4:found
kmem:*:2:root
manymembers:x:777:jill,jody,john,jack,jov,user777
` + largeGroup()

func largeGroup() (res string) {
	var b strings.Builder
	b.WriteString("largegroup:x:1000:user1")
	for i := 2; i <= 7500; i++ {
		fmt.Fprintf(&b, ",user%d", i)
	}
	return b.String()