bug#32177: Current line number shifts one column to the left.

[Eli Zaretskii]

> Date:  Mon, 16 Jul 2018 13:33:03 -0700
> From:  Keith David Bershatsky <esq@lawlist.com>
> Cc:  32177@debbugs.gnu.org
> 
> Although it is not often very that I need to inspect the undo-tree history 
> file, setting bidi-display-reordering to a nil value of t gives a tremendous 
> enhancement to movements within that buffer.  Without setting 
> bidi-display-reordering to nil, movements with arrow keys up/down and so 
> forth is unbearably s-l-o-w.  Occasionally, I have to inspect the desktop 
> save file and that too has some very long lines where I think setting 
> bidi-display-reordering may help.  Here is a little snippet written by Noam 
> Postavsky that produces a line matching the format of the undo-tree history 
> file.

You should know that setting that variable to nil is not supported, so
you are playing with fire, that's all.