/usr/share/gtk-doc/html/pango is in libpango1.0-doc 1.40.5-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/gtk-doc/html/../../doc/libpango1.0-doc/pango
/usr/share/gtk-doc/html/../../doc/libpango1.0-doc/pango