/usr/share/applications/screensavers/moebiusgears.desktop 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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Name=MoebiusGears
Exec=/usr/lib/xscreensaver/moebiusgears -root
TryExec=/usr/lib/xscreensaver/moebiusgears
Comment=Draws a closed, interlinked chain of rotating gears. The layout of the gears follows the path of a moebius strip. See also the "Pinion" and "Gears" screen savers. http://en.wikipedia.org/wiki/Involute_gear http://en.wikipedia.org/wiki/Moebius_strip Written by Jamie Zawinski.
StartupNotify=false
Terminal=false
Type=Application
Categories=Screensaver;
OnlyShowIn=GNOME;
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