bug#51475: read-char-choice should hide the cursor

[Lars Ingebrigtsen]

ndame <laszlomail@protonmail.com> writes:

> Since it only reads a single character, the cursor is unnecessary and 
> unsightly
> in the prompt:
>
> (read-char-choice " a - good\n b - bad\n c - ugly" '(?a ?b ?c))

But it looks nice in

(read-char-choice " a - good; b - bad; c - ugly: " '(?a ?b ?c))

We could hide it if the prompt is multi-line, I guess?  Anybody got an
opinion?

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   bloggy blog: http://lars.ingebrigtsen.no