This file is indexed.

/usr/share/cups/ppd-updaters/foomatic-db-engine is in foomatic-db-engine 4.0.8-2ubuntu1.

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

The actual contents of the file can be viewed below.

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DRIVER_REGEXP='^foomatic:'
GENNICKNAME_REGEXP=''