This file is indexed.

/usr/share/xscreensaver/config/glhanoi.xml is in xscreensaver-gl-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="glhanoi" _label="GLHanoi">

	<command arg="-root"/>
	
	<number id="delay" type="slider" arg="-delay %"
	  _label="Frame rate" _low-label="Low" _high-label="High"
          low="0" high="100000" default="15000" convert="invert"/>
	
	<number id="count" type="slider" arg="-count %"
	  _label="Number of disks" _low-label="0" _high-label="31"
           default="0" low="0" high="31"/>

	<number id="poles" type="slider" arg="-poles %"
	  _label="Number of poles" _low-label="0" _high-label="31"
           default="0" low="3" high="31"/>
		   
	<number id="speed" type="slider" arg="-speed %"
	  _label="Speed (of smallest disks)" _low-label="1" _high-label="20"
           default="1" low="1" high="20"/>

	<number id="trails" type="slider" arg="-trails %"
	  _label="Length of disk trails" _low-label="0" _high-label="10"
           default="2" low="0" high="10"/>
		   
	<boolean id="fog" _label="Enable fog" arg-set="-fog"/>

	<boolean id="wire" _label="Wireframe" arg-set="-wireframe"/>

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

	<boolean id="lighting" _label="Enable lighting" arg-unset="-no-light"/>

	<_description>
Solves the Towers of Hanoi puzzle. Move N disks from one pole to
another, one disk at a time, with no disk ever resting on a disk
smaller than itself.

http://en.wikipedia.org/wiki/Tower_of_Hanoi

Written by Dave Atkinson; 2005.
	</_description>
</screensaver>