/usr/ is in tuareg-mode 1:2.0.9-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/tuareg-mode/
/usr/share/doc/tuareg-mode/changelog.Debian.gz
/usr/share/doc/tuareg-mode/README.md
/usr/share/doc/tuareg-mode/README.Debian
/usr/share/doc/tuareg-mode/copyright
/usr/share/doc/tuareg-mode/NEWS.Debian.gz
/usr/share/emacs/
/usr/share/emacs/site-lisp/
/usr/share/emacs/site-lisp/tuareg-mode/
/usr/share/emacs/site-lisp/tuareg-mode/ocamldebug-tuareg.el
/usr/share/emacs/site-lisp/tuareg-mode/tuareg-light.el
/usr/share/emacs/site-lisp/tuareg-mode/tuareg_indent.el
/usr/share/emacs/site-lisp/tuareg-mode/tuareg.el
/usr/lib/
/usr/lib/emacsen-common/
/usr/lib/emacsen-common/packages/
/usr/lib/emacsen-common/packages/remove/
/usr/lib/emacsen-common/packages/remove/tuareg-mode
/usr/lib/emacsen-common/packages/compat/
/usr/lib/emacsen-common/packages/compat/tuareg-mode
/usr/lib/emacsen-common/packages/install/
/usr/lib/emacsen-common/packages/install/tuareg-mode