Re: [found the culprit] (was: [emacs -q versus empty .emacs file])

[Eli Zaretskii]

> From: Uwe Brauer <address@hidden>
> Date: Wed, 14 Nov 2018 13:12:38 +0100
> 
>  When I run emacs -Q it works as you say, but emacs -Q calls the one
>  Ubuntu provides, which is 25, I am using a compiled git master version
> 
> So with 
> 
>  /opt/emacs27/bin/emacs -Q
> 
> The behavior of Z in dired is new in emacs 17; it does not uncompress a tgz 
> to tar,
> but extract the whole compressed tar, which is a different behavior.

It seems I misunderstood your original report: you wanted Z on a .tgz
file to only uncompress it?  That indeed has been changed in Emacs 26,
for consistency with a .tar.gz file.  I don't think it's a good idea
to have the previous subtle difference back.

I do think that Z on a compressed Tar archive, be it a .tar.gz or .tgz
file, should not by default unpack the archive.  We could have a
special prefix arg to request that, and by default we should just
uncompress the file.  But that's a different issue.