/usr/share/php/PicoFeed/Rules/degroupnews.com.php is in php-picofeed 0.1.18-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15  | <?php
return array(
    'grabber' => array(
        '%.*%' => array(
            'test_url' => 'http://www.degroupnews.com/medias/vodsvod/amazon-concurrence-la-chromecast-de-google-avec-fire-tv-stick',
            'body' => array(
                '//div[@class="contenu"]',
            ),
            'strip' => array(
                '//div[contains(@class, "a2a")]',
            ),
        ),
    ),
);
 |