bug#26911: 25.2; eshell "cd .." doesn't work correctly with TRAMP

[Eli Zaretskii]

> Date: Mon, 31 Aug 2020 17:58:17 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 26911@debbugs.gnu.org, mattiase@acm.org, michael.albinus@gmx.de,
>  yegortimoshenko@gmail.com
> 
> Anyway, I think I understand all the issues now, so I will work on
> fixing them soon in a way that will avoid unnecessary fallout.

Now done.  I reverted most of the changes we've been discussing
lately, and instead installed a simpler change which fixes both this
bug and bug#34834, and doesn't affect any unrelated use cases.

Michael, I'd appreciate Tramp-related testing.  I've ran the standard
tests from the test suite, but I'm sure you have more, including some
tests that are normally disabled.

I believe this bug and bug#34834 can now be closed.

Thanks.