/usr/ is in devscripts-el 35.2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/emacs/
/usr/share/emacs/site-lisp/
/usr/share/emacs/site-lisp/devscripts-el/
/usr/share/emacs/site-lisp/devscripts-el/devscripts.el
/usr/share/emacs/site-lisp/devscripts-el/pbuilder-log-view-mode.el
/usr/share/emacs/site-lisp/devscripts-el/pbuilder-mode.el
/usr/share/doc/
/usr/share/doc/devscripts-el/
/usr/share/doc/devscripts-el/README.Debian
/usr/share/doc/devscripts-el/copyright
/usr/lib/
/usr/lib/emacsen-common/
/usr/lib/emacsen-common/packages/
/usr/lib/emacsen-common/packages/install/
/usr/lib/emacsen-common/packages/install/devscripts-el
/usr/lib/emacsen-common/packages/remove/
/usr/lib/emacsen-common/packages/remove/devscripts-el
/usr/share/doc/devscripts-el/changelog.gz