This file is indexed.

/usr/share/xscreensaver/config/fadeplot.xml is in xscreensaver-data-extra 5.15-3ubuntu1.

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="fadeplot" _label="FadePlot">

  <command arg="-root"/>

  <number id="delay" type="slider" arg="-delay %"
          _label="Frame rate" _low-label="Low" _high-label="High"
          low="0" high="100000" default="30000"
          convert="invert"/>

  <number id="count" type="slider" arg="-count %"
          _label="Thickness" _low-label="Thin" _high-label="Thick"
           low="0" high="30" default="10"/>

  <number id="cycles" type="slider" arg="-cycles %"
           _label="Cycles" _low-label="Small" _high-label="Large"
          low="0" high="10000" default="1500"/>

  <number id="ncolors" type="slider" arg="-ncolors %"
            _label="Number of colors" _low-label="Two" _high-label="Many"
            low="1" high="255" default="64"/>

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

  <_description>
Draws what looks like a waving ribbon following a sinusoidal path.

Written by Bas van Gaalen and Charles Vidal; 1997.
  </_description>
</screensaver>