bug#74255: 30.0.91; artist-mode right to left input introduces gaps

[Eli Zaretskii <eliz@gnu.org>]

> Cc: 74255@debbugs.gnu.org
> Date: Sun, 10 Nov 2024 11:03:43 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > Date: Fri, 08 Nov 2024 12:06:55 +0000
> > From:  Van Ly via "Bug reports for GNU Emacs,
> >  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> > 
> > Drawing a rectangle in artist-mode going in the directions
> > 
> >  . down
> >  . left to right
> >  . up
> >  . right to left
> > 
> > introduces gaps unexpectedly at the final closing top side.  See,
> > 
> > => http://sdf.org/~van.ly/img/emacs-30-0-91-artist-mode-rectangle-draw.jpeg .
> > 
> > To demonstrate,
> > 
> >  1. start, emacs -Q
> >  2. open buffer and activate artist-mode
> >     a. C-x b a RET
> >     b. M-x artist-mode
> >  3. draw line going down
> >     a. C-c .
> >     b. type +, type 40 .
> >  4. draw line going left to right
> >     a. C-c >
> >     b. type +, type 40 .
> >  5. draw line going up
> >     a. C-c ^
> >     b. type +, type 40 .
> >  6. draw line going right to left
> >     a. C-c <
> >     b. type +, type 40 .
> >     c. gaps are introduced between sequences of .
> > 
> > Expected result is a rectangle with no gaps on the top side.
> 
> This was because in Emacs 25 picture-mode started to use string-width,
> which is inaccurate when TAB characters are inserted into the buffer.
> 
> Now fixed on the emacs-30 release branch.

No further comments, so I'm now closing this bug.