/usr/share/doc/cl-asdf/examples/test3.asd is in cl-asdf 2:3.1.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | ;;; -*- Lisp -*-
(defsystem test3
:components
((:file "file1" :if-feature :asdf)
(:file "file2" :if-feature (:not :asdf))))
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