static void usage(void)
{
- fprintf (stderr, _("Usage: %s [-bfhixV] [-ob superblock] "
- "[-oB blocksize] device\n"), program_name);
+ fprintf (stderr, _("Usage: %s [-bfhixV] [-o superblock=<num>] "
+ "[-o blocksize=<num>] device\n"), program_name);
exit (1);
}