/usr/share/cups/ppd-updaters/foomatic-db-gutenprint.ppd-updater is in foomatic-db-gutenprint 5.2.8~pre1-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | DRIVER_REGEXP='^foomatic:\S*-gutenprint-ijs'
GENNICKNAME_REGEXP='s/\.[\d\.]*(|-pre\d+)$//; s/ LF / Large Format /; s/-simplified//i'
|