Re: csv-mode: header does not align when line numbers are displayed

[Eli Zaretskii <eliz@gnu.org>]

> Date: Fri, 29 Apr 2022 09:47:08 +0200
> From: Joost <joostkremers@fastmail.fm>
> 
> Not sure if this should be reported as a bug or not; let me know if it should.

The bug tracker is not just for bugs, it is also for features.  So
yes, please post such suggestions via "M-x report-emacs-bug".

> `csv-mode` has the option to display a header line so you can make column names permanently visible, which is a very nice option. However, when `display-line-numbers-mode` is active, the column names do not line up with the actual columns, because the header line does not take into account the space taken up by the line numbers.
> 
> The following patch seems to be a quick fix:

Thanks.

> Though it doesn't automatically adjust the header line when `display-line-numbers-mode` is toggled or if `display-line-number-width` changes, so it's probably not the ideal solution.

Indeed.  I think tabulated-list.el shows how to cause the adjustment
when the variable is toggled.  Can you use those ideas to submit a
better solution?