bug#20871: 25.0.50; fill-single-char-nobreak-p does not recognize a single-letter word when it is preceded by an open paren

[Marcin Borkowski]

On 2016-04-27, at 10:20, Eli Zaretskii <eliz@gnu.org> wrote:

>> From: Marcin Borkowski <mbork@mbork.pl>
>> Cc: 20871@debbugs.gnu.org
>> Date: Wed, 27 Apr 2016 09:02:36 +0200
>> 
>> >> I see.  So you suggest that instead of patching
>> >> `fill-single-char-nobreak-p' I should have provided another function,
>> >> customized for Polish?
>> >
>> > Yes, I think so.  There's already fill-french-nobreak-p, why shouldn't
>> > there be a Polish predicate?
>> 
>> I attach a new patch. Is it better now?
>
> Yes, thanks.
>
> Just one comment, for your consideration:
>
>> +    (looking-at "[^[:alpha:]][[:alpha:]]")))
>
> You should be aware that starting with Emacs 25.1 [:alpha:] matches a
> very large class of characters, some of them having nothing in common
> with those used in Polish.  So perhaps it is better to use '\cl'
> instead, which will only capture Latin characters?  Just a thought --
> your call.

I guess you are right, Eli - in fact, all one-letter words in Polish are
matched by [aiouwz].  I decided to go with \cl, as you suggested,
though - this way, the function could be (probably) useful also for
Slovaks, for instance.  I attach the corrected patch.

Just to be sure: in my Emacs, \cl matches also ą, ę, ż, ź, á, ö etc.  Is
it intentional?  Is it documented somewhere?

Thanks and best regards,

-- 
Marcin

0003-Add-the-function-fill-polish-nobreak-p.patch
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