bug#50390: Improve documentation of 'read-char-choice-use-read-key' and 'y-or-n-p-use-read-key'

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> I've now added some text to the doc strings of the variables and
>> functions to try to explain what the difference here is, which isn't
>> obvious.  Feel free to improve more -- it's kinda hard to succinctly
>> explain the user interface difference here.
>
> What is the non-succinct explanation?

It's in the patch.  :-)

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