bug#30215: Visiting files from zip archives should not modify directory time

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Date: Mon, 22 Jan 2018 23:52:48 +0200
> 
> Visiting a file from zip archive changes the modification time of
> its directory.  It's possible to prevent directory time modification
> by setting ‘buffer-file-truename’ later after the extractor prepares
> the file in its buffer:

Sorry, I don't think I understand what you are saying (and if I did, I
cannot reproduce it).  I visited a random zip archive on my system,
then pressed RET on one of the files, then killed the buffer which
visited that file -- and didn't see any changes in the time stamps
recorded in the zip archive.  Which is what I'd expect, since visiting
a file from an archive doesn't rewrite the archive, nor modifies it in
any other way.

What am I missing?