/usr/share/emacs/ is in supercollider-emacs 1:3.7.0~repack-4+deb9u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/emacs/site-lisp/
/usr/share/emacs/site-lisp/SuperCollider/
/usr/share/emacs/site-lisp/SuperCollider/sclang-browser.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-dev.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-document.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-help.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-interp.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-keys.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-language.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-menu.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-minor-mode.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-mode.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-server.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-util.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-vars.el
/usr/share/emacs/site-lisp/SuperCollider/sclang-widgets.el
/usr/share/emacs/site-lisp/SuperCollider/sclang.el