MrClay\Cli::getArgumentsListing PHP Method

    public function getArgumentsListing()
    {
        $r = "\n";
        foreach ($this->_args as $letter => $arg) {
            /* @var Arg $arg  */
            $desc = $arg->getDescription();
            $flag = " -{$letter} ";
            if ($arg->mayHaveValue) {
                $flag .= "[VAL]";
            } elseif ($arg->mustHaveValue) {
                $flag .= "VAL";
            }
            if ($arg->assertFile) {
                $flag = str_replace('VAL', 'FILE', $flag);
            } elseif ($arg->assertDir) {
                $flag = str_replace('VAL', 'DIR', $flag);
            }
            if ($arg->isRequired()) {
                $desc = "(required) {$desc}";
            }
            $flag = str_pad($flag, 12, " ", STR_PAD_RIGHT);
            $desc = wordwrap($desc, 70);
            $r .= $flag . str_replace("\n", "\n            ", $desc) . "\n\n";
        }
        return $r;
    }