/usr/share/doc/guile-gnome2-gnome-ui/changelog.Debian.gz is in guile-gnome2-gnome-ui 2.16.2-1.1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/guile-gnome2-gnome-ui/../guile-gnome2-glib/changelog.Debian.gz