This file is indexed.

/usr/share/applications/screensavers/ifs.desktop is in xscreensaver-data-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.

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[Desktop Entry]
Name=IFS
Exec=/usr/lib/xscreensaver/ifs -root
TryExec=/usr/lib/xscreensaver/ifs
Comment=This one draws spinning, colliding iterated-function-system images. Note that the "Detail" parameter is exponential. Number of points drawn is functions^detail. http://en.wikipedia.org/wiki/Iterated_function_system Written by Chris Le Sueur and Robby Griffin.
StartupNotify=false
Terminal=false
Type=Application
Categories=Screensaver;
OnlyShowIn=GNOME;