bug#58447: [PATCH] In project-find-file, add absolute file name to history

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: Eli Zaretskii <eliz@gnu.org>,  Augusto Stoffel <arstoffel@gmail.com>,
>   58447@debbugs.gnu.org
> Date: Mon, 19 Dec 2022 19:55:22 +0200
> 
> >> It looks like
> >> it has no effect because it inserts an empty string.  Maybe better to
> >> filter out empty strings?
> >
> > Sure. Do you want to implement that?
> 
> Done in commit 399433cc2b9.

How about making the code there a bit more efficient by computing
(length abbr-cpd) just once instead of twice?