bug#71499: [PATCH] Make whitespace.el cleanup add missing final newline

[Stefan Kangas <stefankangas@gmail.com>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Robert Pluim <rpluim@gmail.com>
>> Cc: Andrea Corallo <acorallo@gnu.org>,  71499@debbugs.gnu.org,
>>   stefankangas@gmail.com,  bkhl@elektrubadur.se
>> Date: Fri, 14 Jun 2024 14:23:17 +0200
>>
>> >>>>> On Thu, 13 Jun 2024 11:30:51 +0300, Eli Zaretskii <eliz@gnu.org> said:
>>     >> I'm as well for having the patch in, but I guess would be safer in 31 so
>>     >> we have plenty of time to react if needed.
>>
>>     Eli> OK, thanks.  I will then install after the branch is cut.
>>
>>     Eli> Meanwhile, Björn, I have a few comments to the patch:
>>
>>     Eli>   . it needs a NEWS entry announcing the new feature
>>     Eli>   . is there any reason your code to handle the missing newline is not
>>     Eli>     identical to what the implementation of require-final-newline
>>     Eli>     does?
>>
>> Iʼm going to chime in and say that, even though I highlight missing
>> newlines at eob, I donʼt normally set `require-final-newline' to t,
>> because of various reasons involving collaboration with others. So Iʼd
>> have to turn this off once it goes in.

Could you explain why you'd need to turn it off?

Do you usually use `whitespace-cleanup` on files where you collaborate
with others, but then you specifically don't want to ever touch newlines
at eob?

> Maybe this feature should take a hint from require-final-newline?

To my mind, the main use case of this feature would be users that don't
want to set `require-final-newline`, instead preferring to make such
fixes manually.