/usr/share/gtk-doc/html/mate-desktop/ is in libmate-desktop-doc 1.6.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/mate-desktop/MateBG.html
/usr/share/gtk-doc/html/mate-desktop/MateDesktopItem.html
/usr/share/gtk-doc/html/mate-desktop/MateDesktopThumbnailFactory.html
/usr/share/gtk-doc/html/mate-desktop/MateRRLabeler.html
/usr/share/gtk-doc/html/mate-desktop/background.html
/usr/share/gtk-doc/html/mate-desktop/home.png
/usr/share/gtk-doc/html/mate-desktop/index.html
/usr/share/gtk-doc/html/mate-desktop/index.sgml
/usr/share/gtk-doc/html/mate-desktop/intro.html
/usr/share/gtk-doc/html/mate-desktop/left.png
/usr/share/gtk-doc/html/mate-desktop/libmate.html
/usr/share/gtk-doc/html/mate-desktop/mate-desktop-Miscellaneous-Functions.html
/usr/share/gtk-doc/html/mate-desktop/mate-desktop-Miscellaneous-Thumbnail-Functions.html
/usr/share/gtk-doc/html/mate-desktop/mate-desktop-mate-rr-config.html
/usr/share/gtk-doc/html/mate-desktop/mate-desktop-mate-rr-crtc.html
/usr/share/gtk-doc/html/mate-desktop/mate-desktop-mate-rr-mode.html
/usr/share/gtk-doc/html/mate-desktop/mate-desktop-mate-rr-output.html
/usr/share/gtk-doc/html/mate-desktop/mate-desktop-mate-rr-screen.html
/usr/share/gtk-doc/html/mate-desktop/mate-desktop.devhelp2
/usr/share/gtk-doc/html/mate-desktop/randr.html
/usr/share/gtk-doc/html/mate-desktop/right.png
/usr/share/gtk-doc/html/mate-desktop/style.css
/usr/share/gtk-doc/html/mate-desktop/thumbnail.html
/usr/share/gtk-doc/html/mate-desktop/up.png