rem: printf("disk ----------reads------------ -----------writes----------- -------IO-------\n");
add: printf("disk- ------------reads------------ ------------writes----------- -----IO------\n");
context: static void diskheader(void){  printf("disk ----------reads------------ -----------writes----------- -------IO-------\n");  printf("%3s %6s %6s %6s %6s %6s %6s %6s %6s %6s %6s\n",   " ", "total", "merged","sectors","ms","total","merged","sectors","ms","cur","s");}