This file is indexed.

/usr/share/xscreensaver/config/busyspheres.xml is in rss-glx 0.9.1-6ubuntu4.

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="busyspheres" _label="Busy Spheres">

  <command arg="-r"/>

  <_description>
Spheres made of dancing particles.

Written by Ronald Hordijk &lt;hk at dgmr.nl&gt;.
Ported to Linux by Tugrul Galatali - &lt;http://rss-glx.sourceforge.net/&gt;.
  </_description>
</screensaver>