bug#34214: 25.3; minibuffer function help in lisp modes changes match-data

[Lars Ingebrigtsen]

Stefan Kangas <stefan@marxist.se> writes:

>> The "documented" behavior is in Elisp Reference, but not in
>> doc-strings of functions that rely on match data. So they are not so
>> easily spotted by non-experienced users.
>
> I agree that this could be documented in `match-string'.

I've now done so in Emacs 28.

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