This file is indexed.

/usr/share/xscreensaver/config/spotlight.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="spotlight" _label="Spotlight">

  <command arg="-root"/>

  <video href="https://www.youtube.com/watch?v=av29CVh2UeM"/>

  <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="duration" type="slider" arg="-duration %"
          _label="Duration" _low-label="10 seconds" _high-label="10 minutes"
          low="10" high="600" default="120"/>

  <number id="radius" type="slider" arg="-radius %"
          _label="Spotlight size" _low-label="Small" _high-label="Large"
          low="5" high="350" default="125"/>

  <xscreensaver-image />

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

  <xscreensaver-updater />

  <_description>
A spotlight scanning across a black screen, illuminating a loaded
image when it passes.

Written by Rick Schultz and Jamie Zawinski; 1999.
  </_description>
</screensaver>