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

[Lars Ingebrigtsen]

Gregory Heytings <gregory@heytings.org> writes:

> Or we could make it depend on a dynamic variable.  See attached patch.

I'd rather have an optional variable if this is something that should be
controlled.

But I'm not sure we want to.  The original example was:

(read-char-choice " a - good\n b - bad\n c - ugly" '(?a ?b ?c))

But that's an ugly prompt in itself.  If it's amended to

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

then it's fine showing the cursor.  (And that's a prompt should look.)

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