This file is indexed.

/usr/share/xscreensaver/config/cloudlife.xml is in xscreensaver-data-extra 5.15-2ubuntu1.

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="cloudlife" _label="CloudLife">

  <command arg="-root"/>

  <number id="delay" type="slider" arg="-cycle-delay %"
          _label="Frame rate" _low-label="Low" _high-label="High"
          low="0" high="100000" default="25000"
          convert="invert"/>

  <number id="maxage" type="slider" arg="-max-age %"
          _label="Max age" _low-label="Young" _high-label="Old"
          low="2" high="255" default="64"/>

  <number id="density" type="slider" arg="-initial-density %"
          _label="Initial density" _low-label="Low" _high-label="High"
          low="1" high="99" default="30"/>

  <number id="cellsize" type="slider" arg="-cell-size %"
          _label="Cell size" _low-label="Small" _high-label="Large"
          low="1" high="20" default="3"/>

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

  <_description>

Generates cloud-like formations based on a variant of Conway's Life. The
difference is that cells have a maximum age, after which they count as
3 for populating the next generation.  This makes long-lived formations
explode instead of just sitting there.

http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life

Written by Don Marti; 2003.
  </_description>
</screensaver>