/usr/ is in libgnomecanvas2-doc 2.30.3-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/libgnomecanvas2-doc/
/usr/share/doc/libgnomecanvas2-doc/README
/usr/share/doc/libgnomecanvas2-doc/AUTHORS
/usr/share/doc/libgnomecanvas2-doc/copyright
/usr/share/doc/libgnomecanvas2-doc/html/
/usr/share/doc/libgnomecanvas2-doc/html/ch01.html
/usr/share/doc/libgnomecanvas2-doc/html/ch02.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvas.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasBpath.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasClipgroup.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasEllipse.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasGroup.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasItem.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasLine.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasPixbuf.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasPolygon.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasRE.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasRect.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasRichText.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasShape.html
/usr/share/doc/libgnomecanvas2-doc/html/GnomeCanvasWidget.html
/usr/share/doc/libgnomecanvas2-doc/html/home.png
/usr/share/doc/libgnomecanvas2-doc/html/index.html
/usr/share/doc/libgnomecanvas2-doc/html/index.sgml
/usr/share/doc/libgnomecanvas2-doc/html/left.png
/usr/share/doc/libgnomecanvas2-doc/html/libgnomecanvas-gnome-canvas-path-def.html
/usr/share/doc/libgnomecanvas2-doc/html/libgnomecanvas-gnome-canvas-text.html
/usr/share/doc/libgnomecanvas2-doc/html/libgnomecanvas-gnome-canvas-util.html
/usr/share/doc/libgnomecanvas2-doc/html/right.png
/usr/share/doc/libgnomecanvas2-doc/html/style.css
/usr/share/doc/libgnomecanvas2-doc/html/up.png
/usr/share/doc/libgnomecanvas2-doc/html/libgnomecanvas.devhelp2.gz
/usr/share/doc/libgnomecanvas2-doc/NEWS.gz
/usr/share/doc/libgnomecanvas2-doc/changelog.Debian.gz
/usr/share/gtk-doc/
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/libgnomecanvas