/usr/share/gtk-doc/ is in libfm-dev 0.1.17-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/libfm/
/usr/share/gtk-doc/html/libfm/FmBookmarks.html
/usr/share/gtk-doc/html/libfm/FmCellRendererPixbuf.html
/usr/share/gtk-doc/html/libfm/FmCellRendererText.html
/usr/share/gtk-doc/html/libfm/FmConfig.html
/usr/share/gtk-doc/html/libfm/FmDeepCountJob.html
/usr/share/gtk-doc/html/libfm/FmDirListJob.html
/usr/share/gtk-doc/html/libfm/FmDirTreeModel.html
/usr/share/gtk-doc/html/libfm/FmDndSrc.html
/usr/share/gtk-doc/html/libfm/FmDummyMonitor.html
/usr/share/gtk-doc/html/libfm/FmFileInfoJob.html
/usr/share/gtk-doc/html/libfm/FmFileOpsJob.html
/usr/share/gtk-doc/html/libfm/FmFolder.html
/usr/share/gtk-doc/html/libfm/FmFolderModel.html
/usr/share/gtk-doc/html/libfm/FmFolderView.html
/usr/share/gtk-doc/html/libfm/FmJob.html
/usr/share/gtk-doc/html/libfm/FmNavHistory.html
/usr/share/gtk-doc/html/libfm/FmPathEntry.html
/usr/share/gtk-doc/html/libfm/FmPlacesView.html
/usr/share/gtk-doc/html/libfm/FmSimpleJob.html
/usr/share/gtk-doc/html/libfm/FmTabLabel.html
/usr/share/gtk-doc/html/libfm/api-index-full.html
/usr/share/gtk-doc/html/libfm/home.png
/usr/share/gtk-doc/html/libfm/index.html
/usr/share/gtk-doc/html/libfm/index.sgml
/usr/share/gtk-doc/html/libfm/left.png
/usr/share/gtk-doc/html/libfm/libfm-FmDndDest.html
/usr/share/gtk-doc/html/libfm/libfm-fm-app-chooser-combo-box.html
/usr/share/gtk-doc/html/libfm/libfm-fm-app-chooser-dlg.html
/usr/share/gtk-doc/html/libfm/libfm-fm-app-menu-view.html
/usr/share/gtk-doc/html/libfm/libfm-fm-archiver.html
/usr/share/gtk-doc/html/libfm/libfm-fm-clipboard.html
/usr/share/gtk-doc/html/libfm/libfm-fm-file-info.html
/usr/share/gtk-doc/html/libfm/libfm-fm-file-launcher.html
/usr/share/gtk-doc/html/libfm/libfm-fm-file-menu.html
/usr/share/gtk-doc/html/libfm/libfm-fm-file-properties.html
/usr/share/gtk-doc/html/libfm/libfm-fm-gtk-utils.html
/usr/share/gtk-doc/html/libfm/libfm-fm-gtk.html
/usr/share/gtk-doc/html/libfm/libfm-fm-icon-pixbuf.html
/usr/share/gtk-doc/html/libfm/libfm-fm-icon.html
/usr/share/gtk-doc/html/libfm/libfm-fm-list.html
/usr/share/gtk-doc/html/libfm/libfm-fm-mime-type.html
/usr/share/gtk-doc/html/libfm/libfm-fm-monitor.html
/usr/share/gtk-doc/html/libfm/libfm-fm-path.html
/usr/share/gtk-doc/html/libfm/libfm-fm-progress-dlg.html
/usr/share/gtk-doc/html/libfm/libfm-fm-thumbnail.html
/usr/share/gtk-doc/html/libfm/libfm-fm-utils.html
/usr/share/gtk-doc/html/libfm/libfm-fm.html
/usr/share/gtk-doc/html/libfm/libfm.devhelp2
/usr/share/gtk-doc/html/libfm/libfm.html
/usr/share/gtk-doc/html/libfm/object-tree.html
/usr/share/gtk-doc/html/libfm/right.png
/usr/share/gtk-doc/html/libfm/style.css
/usr/share/gtk-doc/html/libfm/up.png