bug#67158: [PATCH] Repair tab-always-indent

[Aymeric Agon-Rambosson <aymeric.agon@yandex.com>]

Le mardi 14 novembre 2023 à 14:39, Eli Zaretskii <eliz@gnu.org> a 
écrit :

> Could you please post a recipe which reproduces the problems you
> describe?

With emacs -Q.

On the scratch buffer (lisp-interaction-mode), eval the following 
lines :

(setq tab-always-indent 'complete)
(setq tab-first-completion 'word)

Then type "tty" (without the quotes) on an empty line, place point 
on the "y", and evaluate '(syntax-after (point))'.

You get "(2)" in the minibuffer, which is proof you are in the 
middle of a word according to the syntax table.

Then, with the point still on the "y", press TAB (or evaluate 
'(indent-for-tab-command)').

"tty" gets autocompleted to "tty-" and the point is placed after 
the "-".

This is in contradiction with what the docstring says about the 
variable tab-first-completion.

This is also reproducible if you set tab-first-completion to 
either 'word-or-paren or 'word-or-paren-or-punct.

A detailed explanation of what causes this can be found in my 
previous mail. Feel free to ask any questions.

The problem is not reproducible anymore with the patch applied.

Best,

Aymeric