[External] : Supplying DOC string in a `defun' using `defvar'

[Christopher Dimech]

> Sent: Wednesday, June 02, 2021 at 3:38 AM
> From: "Stefan Monnier via Users list for the GNU Emacs text editor" 
> <help-gnu-emacs@gnu.org>
> To: help-gnu-emacs@gnu.org
> Subject: Re: [External] : Supplying DOC string in a `defun' using `defvar'
>
> > my-fun is an interactive Lisp function in ‘gungadin.el’.
> >
> > (my-fun X)
> >
> > Not documented.
> 
> You most likely used the old dynamically scoped ELisp dialect.
> In Emacs-28 you should see in the modeline "ELisp/d" where the "/d" is
> highlighted in orange to bring your attention to your use of that old
> dialect and encourage you to change it (e.g. by clicking on it).
> 
> Stefan
 
And change it to what???  That is the whole point.  I installed Emacs 28  
and need to know how to do things for Emacs 28.  If you want the new dialect
why not use lexical binding by default?