public function renderOption(Option $opt)
{
$c1 = '';
if ($opt->short && $opt->long) {
$c1 = sprintf('-%s, --%s', $opt->short, $opt->long);
} else {
if ($opt->short) {
$c1 = sprintf('-%s', $opt->short);
} else {
if ($opt->long) {
$c1 = sprintf('--%s', $opt->long);
}
}
}
$c1 .= $opt->renderValueHint();
return $c1;
}