Le 28/11/2025 à 10:32, Steve Litt a écrit :
> Non-breakable space in HTML is   , but please don't send HTML
> email. An attachment with the plain text equations, etc, in text, TeX,
> LaTeX, Markdown, HTML would be fine. But not HTML email.

    That was exactly the reason of my question: how to put no-break
space in a plain-text mail? I thought no-break space would do it, but it
does'nt. Actually Thunderbird also breaks on any non-alphanumeric
character, like '-' or '/', which makes impossible to preserve an inline
formula. I guess others do the same. But I saw that at least some
markdown procesors behave correctly.

--     Didier