/usr/share/cups/ppd-updaters/printer-driver-postscript-hp.ppd-updater is in printer-driver-postscript-hp 3.16.3+repack0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | DRIVER_REGEXP='^printer-driver-postscript-hp:'
GENNICKNAME_REGEXP='s/\s*(v\d+\.\d+|(Ver|-\s*RC)\s*[\d\.]+)//'
|