This file is indexed.

/usr/share/xscreensaver/config/galaxy.xml is in xscreensaver-data 5.30-1+deb8u2.

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="galaxy" _label="Galaxy">

  <command arg="-root"/>

  <number id="delay" type="slider" arg="-delay %"
          _label="Frame rate" _low-label="Low" _high-label="High"
          low="0" high="100000" default="20000"
          convert="invert"/>

  <number id="count" type="spinbutton" arg="-count %"
          _label="Count" low="-20" high="20" default="-5"/>

  <number id="cycles" type="slider" arg="-cycles %"
           _label="Duration" _low-label="Short" _high-label="Long"
          low="10" high="1000" default="250"/>

  <number id="ncolors" type="slider" arg="-ncolors %"
            _label="Number of colors" _low-label="Two" _high-label="Many"
            low="10" high="255" default="64"/>

  <boolean id="spin" _label="Rotate viewpoint" arg-unset="-no-spin"/>

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

  <xscreensaver-updater />

  <_description>
Spinning galaxies collide.

Written by Uli Siegmund, Harald Backert, and Hubert Feyrer; 1997.
  </_description>
</screensaver>