This file is indexed.

/usr/share/xscreensaver/config/stairs.xml is in xscreensaver-gl-extra 5.30-1+deb8u2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="stairs" _label="Stairs" gl="yes">

  <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"/>

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

  <xscreensaver-updater />

  <_description>
Escher's infinite staircase.

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

Written by Marcelo Vianna; 1998.
  </_description>
</screensaver>