This file is indexed.

/usr/lib/plplot5.9.9/driversd/ps.driver_info is in libplplot11 5.9.9-2ubuntu2.

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

The actual contents of the file can be viewed below.

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ps:PostScript File (monochrome):0:ps:29:psm
psc:PostScript File (color):0:ps:30:psc