seq- functions

[Ikumi Keita]

Hi Arash,

I'd like to ask about your latest commit.
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master origin/master 4004dc6b8f61d45ebdc9dc750e25c6fe024b855e
Author:     Arash Esbati <arash@gnu.org>
AuthorDate: Thu Sep 1 10:35:21 2022 +0200
Commit:     Arash Esbati <arash@gnu.org>
CommitDate: Thu Sep 1 10:35:21 2022 +0200

Simplify the function `LaTeX-array-update-column-letters'

* style/array.el (LaTeX-array-update-column-letters): Simplify by
using seq-functions.  Fix docstring.

[...]

+       (let* ((newtypes (mapconcat #'car (LaTeX-array-newcolumntype-list) ""))
+              (alltypes (concat LaTeX-array-column-letters newtypes)))
+         (seq-concatenate 'string (seq-uniq alltypes #'=)))))
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Is is safe to assume that those seq- functions are available without
(require 'seq) for all supported emacsen? As far as I can see, emacs
25.1 doesn't have autoloads for `seq-uniq' and `seq-concatenate'.

Regards,
Ikumi Keita
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