;;; GWK's implementation of kruskal's - slightly faster, but it doesn't return
;;; a tree (still faster even if it does). Will decide later if which to use
;;; ignoring for now -jjm
;;; GWK's implementation of kruskal's - slightly faster, but it doesn't return
;;; a tree (still faster even if it does). Will decide later if which to use
;;; ignoring for now -jjm