rem: { dump_file (stdin); } else {
add: dump_file(stdin);  else {
context: main (int argc, char *argv[])	{	char *arg = NULL;		if (argc == 1)		{		dump_file (stdin);		}	else		{		char *first = *++argv;				if (strcmp (first, "--help") == 0)			{			usage ();			return 0;			}				if (strcmp (first, "-n") == 0)			{			if (--argc > 1)				{				char *num = *++argv;								if (!isdigit (*num))					printf ("-n option needs a numeric argument\n");				else					{					int b = atoi (num);										if (b < 1)  b = 1;					if (b > 16) b = 16;					BytesBetweenSpaces = b;										if (--argc > 1)						arg = *++argv;					else						printf ("no file specified\n");					}				}			else				printf ("-n option needs a numeric argument\n");			}		else			arg = first;				if (arg)			do_hd (arg);		}		putchar ('\n');	return 0;	}