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bug#28405: Adding entries to LaTeX-indent-environment-list

From: Ikumi Keita
Subject: bug#28405: Adding entries to LaTeX-indent-environment-list
Date: Tue, 01 Feb 2022 18:37:31 +0900

[ Added 28405@debbugs.gnu.org to Cc: ]

>>>>> Uwe Brauer <oub@mat.ucm.es> writes:
>>>> "IK" == Ikumi Keita <ikumi@ikumi.que.jp> writes:
>> Hi all,
>>>>>>> Ikumi Keita <ikumi@ikumi.que.jp> writes:
>>> Thanks for the check. I installed the enhanced fix into the git
>>> repository.

>> I have tweaked LaTeX-indent-environment-list and I noticed bug#28405 [1].
>> Should we add gather and multline environments as well to
>> LaTeX-indent-environment-list like this?

>> diff --git a/style/amsmath.el b/style/amsmath.el
>> index e3cce752..d5fb1da6 100644
>> --- a/style/amsmath.el
>> +++ b/style/amsmath.el
>> @@ -154,7 +154,8 @@
>> (setq-local LaTeX-indent-environment-list
>> (append LaTeX-indent-environment-list
>> -                       '(("equation*")
>> +                       '(("equation*") ("gather") ("gather*")
>> +                         ("gathered") ("multline") ("multline*")
>> ("align"       LaTeX-indent-tabular)
>> ("align*"      LaTeX-indent-tabular)
>> ("aligned"     LaTeX-indent-tabular)

>> Note that this fixes bug#28405 whereas it disables filling inside gather
>> and multline environments, which might confuse some users.

> I am confused that patches of your disable the filling inside gather and
> multiline environments? That is to say very long lines are not filled
> anymore?

Yes. More precisely, auto fill still works. However, explicit filling
invoked by M-q, C-c C-q C-e etc. is disabled.

> Hm, I have not tried that out, but my first impression is: I'd
> rather prefer long lines to be broken, (filled) automatically otherwise
> it is confusing.

I have the same idea. It's confusing and inconvenient for users like us.
1. bug#28405 shows that there does exist users who don't think so and
   prefer filling is disabled inside math environmnets.
2. Filling has already been disabled in "equation", "equation*" and
   "displaymath" environments in AUCTeX. In other words, there is
   inconsistency between those envs and "gather", "multline" envs.

Hence I think we should discuss what to do with users of various ideas.

Ikumi Keita

>> [1] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28405

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