This file is indexed.

/etc/roundcube/plugins/help/config.inc.php is in roundcube-plugins 1.2~beta+dfsg.1-0ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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<?php
// Empty configuration for help
// See /usr/share/roundcube/plugins/help/config.inc.php.dist for instructions
// Check the access right of the file if you put sensitive information in it.
?>