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So this patch changes long-standing behavior in non-trivial ways, and<= span style=3D"letter-spacing: normal; font-family: "Segoe UI Web (West= European)", "Segoe UI", -apple-system, BlinkMacSystemFont, = Roboto, "Helvetica Neue", sans-serif; font-size: 14.6667px; color= : rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
I'm not sure what it can break, after so many years.  I understand=
that it makes certain customizations in whitespace-mode look better on
display in some cases, but display-tables are used in Emacs not just
in whitespace-mode.
Yes, You are right. In fact, I'm not sure what it can break either. So I= have
used this patch locally for about one year with self-compiled emacs29.
Fortunately, it didn't bring any side effects for me.  However, of = course,
I cannot cover every function and every package for emacs.

It is really fundamental code. On the other hand, it is also annoying to=
use whitespace-mode with unaligned tabs-mark. Would you be happy<= /div>
if I add an option for this behavior like 'display-vector-limit-tab' whi= ch
defaults to nil? Finally, it won't change default behavior for all emacs= ers
and anybody like me who has trouble with this issue can turn it on in
their configuration file so they can test if it has side effects for the= m or
they can share this fix.

=B7=A2=BC=FE=C8=CB: Eli Zaretskii <eliz@gnu.org>
=B7=A2=CB=CD=CA=B1=BC=E4: 2024=C4=EA1=D4=C214=C8=D5 10:14
=CA=D5=BC=FE=C8=CB: Young Arto <jifengsi@hotmail.com>
=B3=AD=CB=CD: 68441@debbugs.gnu.org <68441@debbugs.gnu.org&g= t;
=D6=F7=CC=E2: Re: bug#68441: Fix the unaligned tab in whitespac= e mode
 
> From: Young Arto <jifengsi@ho= tmail.com>
> Date: Sat, 13 Jan 2024 12:23:27 +0000
> msip_labels:
>
> There is a bug in whitespace mode which used the display table to
> replace a tab with a tab-mark vector.
>
> If we has a line like this:
> ------
> 123\t5678
> ------
>
> If tab-width is 4 and tab-mark is [?> ?\t],
> The line will be displayed as following:
> (we use '^' to represent tab extra spaces)
> ------
> 123>^^^^5678
> ------
>
> However, it should be displayed as:
> ------
> 123>5678
> ------

I'm not sure I agree.  We never display a TAB as nothing, no matter if=
it comes from a display vector or from a buffer or from any other
source.

So this patch changes long-standing behavior in non-trivial ways, and
I'm not sure what it can break, after so many years.  I understand
that it makes certain customizations in whitespace-mode look better on
display in some cases, but display-tables are used in Emacs not just
in whitespace-mode.

Thanks.
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