[PATCH 1/5] emacs: Handle updating by ID after REPL restart.

[Alex Kost]

Hello, this patchset is for adding “M-x guix-pull” command, plus some
related (and not very related) changes.

The attached patch fixes the following problem:

You describe a package by pressing RET in a list of packages and you get
*Guix Package Info* buffer with this package.  Then if you restart Guix
REPL and revert the "info" buffer, you get "Packages not found" because
the package is identified by an ‘object-address’ which is not actual
anymore.

So as a workaround instead of using a search by ID, a search by name
will be used after a REPL restart.

0001-emacs-Handle-updating-by-ID-after-REPL-restart.patch
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