-this mode. (Not all major modes have one.) Only the (still
-experimental and unadvertised) command @code{customize-mode} currently
-uses this. @code{define-derived-mode} does @emph{not} automatically
-define the specified customization group.
+this mode. (Not all major modes have one.) The command
+@code{customize-mode} uses this. @code{define-derived-mode} does
+@emph{not} automatically define the specified customization group.