/usr/share/gtk-doc/html/libgwyapp/ is in libgwyddion20-doc 2.34-3ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/libgwyapp/GwyDataChooser.html
/usr/share/gtk-doc/html/libgwyapp/GwyPlainTool.html
/usr/share/gtk-doc/html/libgwyapp/GwyResourceEditor.html
/usr/share/gtk-doc/html/libgwyapp/GwyTool.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-14.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-18.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-21.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-23.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-3.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-32.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-33.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-7.html
/usr/share/gtk-doc/html/libgwyapp/api-index-2-9.html
/usr/share/gtk-doc/html/libgwyapp/api-index-deprecated.html
/usr/share/gtk-doc/html/libgwyapp/api-index-full.html
/usr/share/gtk-doc/html/libgwyapp/home.png
/usr/share/gtk-doc/html/libgwyapp/index.html
/usr/share/gtk-doc/html/libgwyapp/index.sgml
/usr/share/gtk-doc/html/libgwyapp/left-insensitive.png
/usr/share/gtk-doc/html/libgwyapp/left.png
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-GwyGLMaterialEditor.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-GwyGradientEditor.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-Validate.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-app.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-data-browser.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-file-module-utils.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-file.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-filelist.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-funcuse.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-menu.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-meta.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-module-utils.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-settings.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-undo.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp-wait.html
/usr/share/gtk-doc/html/libgwyapp/libgwyapp.devhelp2
/usr/share/gtk-doc/html/libgwyapp/right-insensitive.png
/usr/share/gtk-doc/html/libgwyapp/right.png
/usr/share/gtk-doc/html/libgwyapp/style.css
/usr/share/gtk-doc/html/libgwyapp/up-insensitive.png
/usr/share/gtk-doc/html/libgwyapp/up.png