This file is indexed.

/usr/share/xscreensaver/config/hufo_tunnel.xml is in rss-glx 0.9.1-5ubuntu2.

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

The actual contents of the file can be viewed below.

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<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="hufo_tunnel" _label="Hufo's Tunnel">

  <command arg="-r"/>

  <number id="01" type="slider" arg="-c %"
          _label="Speed" _low-label="Smoother" _high-label="Faster"
          low="0" high="3" default="0"/>

  <select id="02">
    <option id="02A" _label="Material - Default"/>
    <option id="02B" _label="Material - none" arg-set="-t 0"/>
    <option id="02C" _label="Material - Swirl" arg-set="-t 1"/>
    <option id="02D" _label="Material - Marble" arg-set="-t 2"/>
  </select>

  <boolean id="03" _label="Wireframe" arg-set="-w"/>
  <boolean id="04" _label="Sinusoide" arg-set="-s"/>

  <_description>
Flying through tunnels with various qualities.

Written by Jeremie Allard &lt;hufo at planet-d.net&gt;.
Ported to Linux by Tugrul Galatali - &lt;http://rss-glx.sourceforge.net/&gt;.
  </_description>
</screensaver>