bug#25154: 25.1; Bindings in cl-letf are in reverse order

[Eli Zaretskii]

> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Fri, 23 Dec 2016 12:17:54 +0000
> Cc: tino.calancha@gmail.com, 25154@debbugs.gnu.org, agrambot@gmail.com
> 
>  I agree, patches to that effect are welcome. (AFAICT, the manual
>  tries to say that already, but the wording could be more explicit.)
> 
> OK, I've attached a patch that hopefully clarifies this a bit. 

Thanks.  My only comment is that I think we prefer talking about
"binding" instead of "assignment".