bug#64019: 29.0.91; Fix some tree-sitter :match regexps

[Andreas Schwab]

On Jun 17 2023, Dmitry Gutov wrote:

> On 15/06/2023 20:17, Basil Contovounesios wrote:
>> Mattias also spotted the following in
>> https://github.com/mattiase/relint/pull/14:
>> -                              (:match "\\`?[#\"'`:?]" @char))
>> +                              (:match "\\`\\?[#\"'`:?]" @char))
>
> I don't mind, but it seems like both versions do the same thing:
>
> (string-match-p "\\`?!" "?!") => 0
>
> (string-match-p "\\`?!" "!") => nil

This depends on `?' being treated as an ordinary character if occuring
in a context where the special meaning does not make sense, which is
poor practice.

-- 
Andreas Schwab, schwab@linux-m68k.org
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