bug#55387: 28.1.50; csv-mode: header does not align when line numbers are displayed

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> I don't think I understand how this could work.  The line-number width
> is not fixed, it changes dynamically as needed.  How would the
> header-line adapt itself, except in some hook that is called by
> redisplay?

header-line-format would look like

(display-line-spaces <the rest>)

where display-line-spaces would indeed be updated by the redisplay code
(to be of the same length as (line-number-display-width 'columns)).

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