;; Submenu is max 2 entries longer than menu, never shorter, number of
;; entries in submenus differ by at most one (with longer submenus first)
(let* ((outer (floor (sqrt len)))
;; Submenu is max 2 entries longer than menu, never shorter, number of
;; entries in submenus differ by at most one (with longer submenus first)
(let* ((outer (floor (sqrt len)))