bug#67201: 29.1; line-prefix shown at the beginning of continuation line

[Eli Zaretskii <eliz@gnu.org>]

> From: awrhygty@outlook.com
> Date: Wed, 15 Nov 2023 16:33:46 +0900
> 
> 
> Evaluate the form below, a logically long line is displayed with wrapping.
> '[start]' should be displayed only at the beginning of the logical line.
> Type 'C-u 1 C-v', the buffer scrolls up, but the '[start]' string stays
> at the top-left of the window. Type one more 'C-u 1 C-v', '[start]'
> string stays there, too.
> Then type 'M-x C-g'(quit), the displayed characters are shifted a little,
> and type 'C-p', the buffer scrolls down, and the '[start]' string is
> displayed in two place, the beginning of the buffer and the beginning of
> the physical line which was displayed at the top of the window.
> 
> And one more bug in the same buffer that the cursor gets invisible.
> Move the point at the point one character to the end of the first
> physical line and type 'C-f', then the cursor gets invisible.
> Logically the point is at the beginning of the next physical line.
> Type one more 'C-f', the cursor is shown at the second character of the
> second physical line.

Thanks, should be fixed now on the master branch.