This file is indexed.

/usr/share/xscreensaver/config/nerverot.xml is in xscreensaver-data-extra 5.36-1ubuntu1.

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="nerverot" _label="NerveRot">

  <command arg="-root"/>

  <video href="https://www.youtube.com/watch?v=oUfgDnyGqHM"/>

  <hgroup>
   <vgroup>
    <number id="delay" type="slider" arg="-delay %"
            _label="Frame rate" _low-label="Low" _high-label="High"
            low="0" high="100000" default="10000"
            convert="invert"/>

    <number id="iters" type="slider" arg="-max-iters %"
            _label="Duration" _low-label="Short" _high-label="Long"
            low="100" high="8000" default="1200"/>

    <number id="count" type="slider" arg="-count %"
            _label="Blot count" _low-label="Few" _high-label="Many"
            low="1" high="1000" default="250"/>

    <number id="ncolors" type="slider" arg="-colors %"
            _label="Colors" _low-label="Two" _high-label="Many"
            low="1" high="255" default="4"/>
   </vgroup>
   <vgroup>
    <number id="event" type="slider" arg="-event-chance %"
            _label="Changes" _low-label="Seldom" _high-label="Frequent"
             low="0.0" high="1.0" default="0.2"/>

    <number id="nervous" type="slider" arg="-nervousness %"
            _label="Nervousness" _low-label="Calm" _high-label="Spastic"
             low="0.0" high="1.0" default="0.3"/>

    <number id="mnr" type="slider" arg="-max-nerve-radius %"
            _label="Crunchiness" _low-label="Low" _high-label="High"
             low="0.0" high="1.0" default="0.7"/>

    <number id="linewidth" type="spinbutton" arg="-line-width %"
            _label="Line thickness" low="0" high="100" default="0"/>

    <boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>

   </vgroup>
  </hgroup>

  <!-- #### -iter-amt [0.01] -->
  <!-- #### -min-scale [0.6] -->
  <!-- #### -max-scale [1.75] -->
  <!-- #### -min-radius [3] -->
  <!-- #### -max-radius [25] -->

  <xscreensaver-updater />

  <_description>
Nervously vibrating squiggles.

Written by Dan Bornstein; 2000.
  </_description>
</screensaver>