rem: printf("--ulog-prefix %s ", loginfo->prefix);
add: printf("--ulog-prefix \"%s\" ", loginfo->prefix);
context: static void save(const struct ipt_ip *ip,		 const struct ipt_entry_target *target){	const struct ipt_ulog_info *loginfo	    = (const struct ipt_ulog_info *) target->data;	if (strcmp(loginfo->prefix, "") != 0)		printf("--ulog-prefix %s ", loginfo->prefix);	if (loginfo->nl_group != ULOG_DEFAULT_NLGROUP) {		printf("--ulog-nlgroup ");		print_groups(loginfo->nl_group);		printf("\n");	}	if (loginfo->copy_range)		printf("--ulog-cprange %d", loginfo->copy_range);}