/usr/share/acl2-4.3/books/fix-cert/test-fix-cert2.acl2 is in acl2-books-source 4.3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1
(certify-book "test-fix-cert2" 0 t :ttags :all)