/usr/share/doc/libgda4-doc/html is in libgda-4.0-doc 4.2.8-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgda4-doc/../../gtk-doc/html/libgda-4.0
/usr/share/doc/libgda4-doc/../../gtk-doc/html/libgda-4.0