Backport commit 16faff6a4 from Emacs

; * lisp/org/org-table.el: Replace obsolete alias in comment.
16faff6a46f28b4db2e9b91e52b27404303f3197
Glenn Morris
Fri Mar 9 12:43:21 2018 -0500

lisp/org-table.el

@@ -5433,7 +5433,7 @@ which will prompt for the width."
 ;; - orgtbl-uc-draw-cont (smooth unicode)
 
 ;; This is best viewed with the "DejaVu Sans Mono" font
-;; (use M-x set-default-font).
+;; (use M-x set-frame-font).
 
 (defun orgtbl-uc-draw-grid (value min max &optional width)
   "Draw a bar in a table using block unicode characters.