[Fix bbatsov#1194] Restore the advise-commands macro

I didn't notice that it had other usages in the code when I deleted
it in the commit introducing super-save.

core/prelude-editor.el

@@ -293,6 +293,16 @@
   (if (<= (- end beg) prelude-yank-indent-threshold)
       (indent-region beg end nil)))
 
+(defmacro advise-commands (advice-name commands class &rest body)
+  "Apply advice named ADVICE-NAME to multiple COMMANDS.
+
+The body of the advice is in BODY."
+  `(progn
+     ,@(mapcar (lambda (command)
+                 `(defadvice ,command (,class ,(intern (concat (symbol-name command) "-" advice-name)) activate)
+                    ,@body))
+               commands)))
+
 (advise-commands "indent" (yank yank-pop) after
   "If current mode is one of `prelude-yank-indent-modes',
 indent yanked text (with prefix arg don't indent)."