This file is indexed.

/usr/share/xscreensaver/config/polyominoes.xml is in xscreensaver-data-extra 5.34-2ubuntu1.

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="polyominoes" _label="Polyominoes">

  <command arg="-root"/>

  <video href="http://www.youtube.com/watch?v=6j2H2gL8cws"/>

  <boolean id="identical" _label="Identical pieces" arg-set="-identical"/>

  <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="cycles" type="slider" arg="-cycles %"
           _label="Duration" _low-label="Short" _high-label="Long"
          low="500" high="5000" default="2000"/>

  <number id="ncolors" type="slider" arg="-ncolors %"
            _label="Number of colors" _low-label="Two" _high-label="Many"
            low="2" high="255" default="64"/>

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

  <xscreensaver-updater />

  <_description>
Repeatedly attempts to completely fill a rectangle with
irregularly-shaped puzzle pieces.

https://en.wikipedia.org/wiki/Polyomino

Written by Stephen Montgomery-Smith; 2002.
  </_description>
</screensaver>