* lisp/gnus/gnus-cus.el (gnus-custom-mode): Put in the keymap to use,
otherwise the bindings are looked up in the global map (where they
don't exist).
(define-derived-mode gnus-custom-mode fundamental-mode "Gnus Customize"
"Major mode for editing Gnus customization buffers.
-The following commands are available:
+The following commands are available:\\<widget-keymap>
\\[widget-forward] Move to next button or editable field.
\\[widget-backward] Move to previous button or editable field.
-\\[widget-button-click] Activate button under the mouse pointer.
+\\[widget-button-click] Activate button under the mouse pointer.
\\[widget-button-press] Activate button under point.
Entry to this mode calls the value of `gnus-custom-mode-hook'