[Clients] Gemini and accessibility regarding preformatted code blocks

[Stephane Bortzmeyer]

On Fri, Feb 26, 2021 at 08:59:48AM +0100,
 Solene Rapenne <solene at perso.pw> wrote 
 a message of 59 lines which said:

> Asking people to write English words in their capsule is not nice.
> I'm against the use of words like this to define a content,
> convention or not.

OK, inspired by my past life as a Perl programmer, I suggest a fully
i18n solution:

```@    (ASCII art)
```$    (Code)
```%    (poetry)
```|    (data)

:-)