Backport commit 530067463 from Emacs

* lisp/org-attach.el (org-attach-unset-directory): Replace "different
than" by "different from".

Correct "different than" to "different from" where appropriate
530067463bffc982f02dcc4f2805d389704575b4
Alan Mackenzie
Sun Feb 9 14:33:14 2020 +0000

lisp/org-attach.el

@@ -428,7 +428,7 @@ attachment-folder.
 
 Change of attachment-folder due to unset might be if an ID
 property is set on the node, or if a separate inherited
-DIR-property exists (that is different than the unset one)."
+DIR-property exists (that is different from the unset one)."
   (interactive)
   (let ((old (org-attach-dir))
 	(new