bug#79300: fold-nbsp test failure

On 03/09/2025 05:04, Collin Funk wrote:
> Pádraig Brady <[email protected]> writes:
> 
>>> Thanks, I forgot about that function. That sounds like a good idea
>>> to
>>> me. We can be nice to people who do not use glibc.
>>> We will have to hoist the 'posixly_correct' check out of it before
>>> though. Technically POSIX says that 'fold -s' should only break at
>>> <blank> characters. But I rather avoid adding more
>>> getenv ("POSIXLY_CORRECT") to programs that do not yet have them.
>>
>> Yes I agree that fold should not depend on POSIXLY_CORRECT,
>> so c32isnbspace() should only look at the passed char.
> 
> This patch should do the trick. It fixes it on Solaris 11.4 (cfarm215).
> I couldn't reproduce the failure seen on the CI machines in my NetBSD 10
> VM. But I see no reason why this fix wouldn't work there too.
> 
> Will push it tomorrow.

I would have left iswnbspace() in wc.c, calling into c32isnbspace(),
otherwise the double negative with posixly_correct is awkward.
Anyway the logic looks good.

thanks!
Padraig