Parsedown::inlineEmailTag( $Excerpt )

    protected function inlineEmailTag($Excerpt)
    {
        $hostnameLabel = '[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?';

        $commonMarkEmail = '[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~-]++@'
            . $hostnameLabel . '(?:\.' . $hostnameLabel . ')*';

        if (strpos($Excerpt['text'], '>') !== false
            and preg_match("/^<((mailto:)?$commonMarkEmail)>/i", $Excerpt['text'], $matches)
        ){
            $url = $matches[1];

            if ( ! isset($matches[2]))
            {
                $url = "mailto:$url";
            }

            return array(
                'extent' => strlen($matches[0]),
                'element' => array(
                    'name' => 'a',
                    'text' => $matches[1],
                    'attributes' => array(
                        'href' => $url,
                    ),
                ),
            );
        }
    }