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

[Juri Linkov]

> I think the idea of per-project histories is an interesting feature that
> requires some careful design, but note that there is a bug in
> project-find-file that should ideally be fixed for Emacs 29 (namely, it
> pollutes the find-file history by adding non-absolute file names to it).
>
> The patch in my original message fixes this and shouldn't complicate a
> future implementation of the per-project histories.

Would be nice to fix this.  The problem that I have is that when a file
visited by 'C-x p f non-absolute/filename' needs to be revisited later,
then the quickest way is with 'C-x C-f M-p', but currently it fails
with non-absolute file names.

But please note that the same problem exists in both ways:
when trying to revisit an absolute file names previously visited
by 'C-x C-f', then 'C-x p f' fails on absolute file names.