bug#48257: Align to right doesn't account for window separator in terminal frames

[Eli Zaretskii]

> Date: Tue, 06 Jul 2021 15:49:42 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 48257@debbugs.gnu.org
> 
> I don't think it's related, I think it's a separate issue.  Notice how
> the truncated "123" string starts 2 columns after the "$" truncation
> indicator, whereas the un-truncated "1234" starts only 1 column after
> "$".
> 
> So I think there's something else at work here, and will take a closer
> look soon.

Like I suspected, an unrelated problem (and a very old one at that).
Should be fixed now on the master branch.

Thanks.