bug#21589: 24.5; contradiction in info

[Noam Postavsky]

> thanks for your quick reply.  I see what you mean, the append is
> further down and I was looking at the code following this comment
> where it says 'append' (line 3 below) and then uses cons (line 6).

So it seems like the problem is just that the comment is wrong?
(clearly that not code is not appending, the new item is being added
at the front)

diff --git a/doc/lispintro/emacs-lisp-intro.texi
b/doc/lispintro/emacs-lisp-intro.texi
index 10162b3..86c8da0 100644
--- a/doc/lispintro/emacs-lisp-intro.texi
+++ b/doc/lispintro/emacs-lisp-intro.texi
@@ -15465,7 +15465,7 @@ Files List
 @group
       (cond
        ;; check to see whether filename ends in '.el'
-       ;; and if so, append its name to a list.
+       ;; and if so, add its name to a list.
        ((equal ".el" (substring (car (car current-directory-list)) -3))
         (setq el-files-list
               (cons (car (car current-directory-list)) el-files-list)))