bug#40671: [DOC] modify literal objects

[Eli Zaretskii]

> From: Richard Stallman <rms@gnu.org>
> Date: Thu, 30 Apr 2020 22:47:32 -0400
> Cc: ke.vigouroux@laposte.net, 40671@debbugs.gnu.org, michael_heerdegen@web.de,
>  mattiase@acm.org, dgutov@yandex.ru
> 
> To a purist, the vagueness about what happens to Emacs if you modify
> code at the wrong time may seem intolerable.  If there were an easy
> and painless way to implement well-defined behavior, it might be worth
> doing so.  But there isn't.
> 
> This isn't a big difficulty in practice.  It isn't worth sacrificing
> anything that matters.

I agree, but the practical problem is that we have a couple of purists
on board, for whom this is an itch they scratch not too infrequently.