/usr/share/gtk-doc/html/ is in python-gtksourceview2 2.10.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/pygtksourceview2/
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourcebuffer2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourcegutter2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourcelanguage2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourcelanguagemanager2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourcemark2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourceprintcompositor2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourcestyle2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourcestylescheme2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourcestyleschememanager2.html
/usr/share/gtk-doc/html/pygtksourceview2/class-gtksourceview2.html
/usr/share/gtk-doc/html/pygtksourceview2/index.html
/usr/share/gtk-doc/html/pygtksourceview2/index.sgml
/usr/share/gtk-doc/html/pygtksourceview2/pygtksourceview2.devhelp
/usr/share/gtk-doc/html/pygtksourceview2/style.css