bug#49278: 28.0.50; Lisp Mode is for Common Lisp

[Eli Zaretskii]

> From: João Távora <joaotavora@gmail.com>
> Date: Wed, 30 Jun 2021 15:54:39 +0100
> Cc: Stefan Monnier <monnier@iro.umontreal.ca>, 49278@debbugs.gnu.org
> 
> > Lisp mode is the major mode for editing programs written in
> > general-purpose Lisp dialects, such as Common Lisp.
> 
> But that is false :-)  Scheme, Clojure and Phil's Fennel are two
> "general purpose Lisp dialects" that are not at all well suited
> to be edited with lisp-mode in Emacs.

Would it be okay to mention those 3 exceptions explicitly?