/usr/share/help/gu/gnome-help/net-wireless-disconnecting.page is in gnome-user-guide 3.18.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/help/gu/gnome-help/../../../help-langpack/gu/gnome-help/net-wireless-disconnecting.page