Backport typo fixes from Emacs revno 115988

lisp/org-list.el

@@ -1223,7 +1223,7 @@ some heuristics to guess the result."
        ;; When `org-blank-before-new-entry' says so, it is 1.
        ((eq insert-blank-p t) 1)
        ;; `plain-list-item' is 'auto.  Count blank lines separating
-       ;; neighbours items in list.
+       ;; neighbors' items in list.
        (t (let ((next-p (org-list-get-next-item item struct prevs)))
 	    (cond
 	     ;; Is there a next item?

lisp/ox.el

@@ -5093,7 +5093,7 @@ Return the new string."
 ;;;; Topology
 ;;
 ;; Here are various functions to retrieve information about the
-;; neighbourhood of a given element or object.  Neighbours of interest
+;; neighborhood of a given element or object.  Neighbors of interest
 ;; are direct parent (`org-export-get-parent'), parent headline
 ;; (`org-export-get-parent-headline'), first element containing an
 ;; object, (`org-export-get-parent-element'), parent table