sub usage
{
    $0 =~ s#.*/##;
    print STDERR <<EOUsage;

Usage: $0 [options]

where options are:
     [-v         ] | [--version                       ]

[more of the same...deleted...deleted...deleted...deleted]

     [-db <n>    ] | [--debug <n>                     ]
     [-pm/+pm    ] | [--preformat-marker / --nopreformat-marker ]

  More complete explanations of these options can be found in 
  comments near the beginning of the script.

EOUsage
#     [-T <t>:<r> ] | [--tag <tagname>:<regexp>        ]
}