* If long_only and the ARGV-element has the form "-f", where f is
* a valid short option, don't consider it an abbreviated form of
* a long option that starts with f. Otherwise there would be no
* way to give the -f short option.
* If long_only and the ARGV-element has the form "-f", where f is
* a valid short option, don't consider it an abbreviated form of
* a long option that starts with f. Otherwise there would be no
* way to give the -f short option.