bug#28855: 26.0.90; display-line-numbers-mode does not respect (line|wrap)-prefix '(space :align-to N) text property

[Eli Zaretskii]

> Date: Wed, 18 Oct 2017 20:34:37 +0200
> From: martin rudalics <rudalics@gmx.at>
> CC: dgutov@yandex.ru, 28855@debbugs.gnu.org, monnier@iro.umontreal.ca, 
>  johnw@gnu.org
> 
>  > After the change, if someone wants to always measure the offset from
>  > the window edge, they could/should use
>  >
>  >    :align-to (+ left-fringe left-fringe N)
> 
> Unless ‘fringes-outside-margins’ is non-nil and there's a left margin.

For that, there's left-margin that can play the same role.