bug#72420: set-goal-column misbehaves with a line-prefix and visual-line-mode

["Martin Edstrom" <meedstrom@runbox.eu>]

> > From: "Martin Edstrom" <meedstrom@runbox.eu>
> > CC: "72420" <72420@debbugs.gnu.org>
> > Date: Wed, 07 Aug 2024 14:07:45 +0200 (CEST)
> > 
> > But, it's odd that visual-line-mode does not affect it for you - it does for me. 
> > 
> > If I leave visual-line-mode off, then I get the behavior I expect (i.e. set-goal-column at column 2 is treated as column 6), which is useful.  Turning it on causes the command to behave in a way that is not useful, as I described.
> 
> If you leave visual-line-mode off, then type C-p twice from "z", don't
> you see point go to the 3rd "*" of the line "**** h4"?  And if so,
> isn't that what you meant by "the goal column actually seems to be
> offset in some way influenced by the line prefix"?  Or did I
> misunderstand what you consider a problem in the existing behavior?

Indeed, on that line, the behavior is the same with and without visual-line-mode, going to the 3rd "*".

However if I go up to a list item such as "- x...........", I observe different behavior.  With visual-line-mode, point ends up on the bullet, not on "x".

That is surprising, no?

Martin