/usr/share/php/PicoFeed/Rules/linuxinsider.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 16 17 18 19 20 21  | <?php
return array(
    'grabber' => array(
        '%.*%' => array(
            'test_url' => 'http://www.linuxinsider.com/story/82526.html?rss=1',
            'body' => array(
                '//div[@id="story"]',
            ),
            'strip' => array(
                '//script',
                '//h1',
                '//div[@id="story-toolbox1"]',
                '//div[@id="story-byline"]',
                '//div[@id="story"]/p',
                '//div[@class="story-advertisement"]',
                '//iframe',
            ),
        ),
    ),
);
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