Re: Have to run redraw-display manually

[Cos Chan <rosettas@gmail.com>]

On Tue, Sep 21, 2021 at 1:16 PM Eli Zaretskii <eliz@gnu.org> wrote:

> [Why private email?]
>
Sorry I didn't notice that Gmail automatically put the private Email in
reply.


> > From: Cos Chan <rosettas@gmail.com>
> > Date: Tue, 21 Sep 2021 13:03:46 +0200
> >
> > I did more testing, and it seems that changing the system tab width by
> > $ tabs 4
> > would create this problem(also in tcsh). If I change it back to 8 the
> problem is gone.
> >
> > Here is content of my .emacs file:
> > (add-to-list 'load-path "~/.emacs.d/lisp/")
> > ;; lisp scripts
> > (require 'sudo-save)
> > ;; editting settings
> > (setq-default indent-tabs-mode t)
> > (setq-default tab-width 4)
> > (normal-erase-is-backspace-mode 1)
> > ;; backup and autosave to temporary directory
> > (setq backup-directory-alist
> >       `((".*" . ,temporary-file-directory)))
> > (setq auto-save-file-name-transforms
> >       `((".*" ,temporary-file-directory t)))
> > ;; set color to be compatible with dark background
> > (setq frame-background-mode 'dark)
> >
> > I made a simple file test_emacs for testing, here is the content:
> > HISTSIZE=999
> > SAVEHIST=999
> > setopt appendhistory autocd beep extendedglob nomatch notify
> >
> > How to reproduce:
> > $ emacs test_emacs
> > type 2 times ctrl-n, the point is on "s" (from setopt, line 3)
> > type alt-f, the point is on character "t" (from setopt, line 3, the
> third character)
> > type alt-x and redraw display, the point is on the first space (line3,
> the 7th character)
> >
> > With little tuning for the testing file, I removed the last "t" from
> "setopt" and the testing result was:
> > $ emacs test_emacs
> > type 2 times ctrl-n, the point is on "s" (from setopt, line 3)
> > type alt-f, the point is on the first space. (Which is correct)
> > type alt-f, the point is on the second space. (Which is correct)
> > type alt-f, the point is on the third space. (Which is correct)
> > type alt-f, the point is on the "b". (from beep, which is incorrect)
> > type alt-x and redraw display, the point is on the fourth space.
> >
> > Please suggest.
>
> My suggestion is not to do "tabs 4", it changes how the terminal
> behaves regarding cursor motion.
>
>
Clear and I will not do it. May I suggest adding this warning to the Emacs
documents?
In case I may reproduce in several systems, that can be a common issue.

And I am pretty sure before I upgraded the Emacs there was no such issue.
But I don't remember the version number of the Emacs I had.

-- 
Regards
Cos Chan