[PATCH] emacs: tree: bugfix: specify --format-version

[David Bremner]

Mark Walters <markwalters1009 at gmail.com> writes:

> Previously notmuch tree did not specify the format-version when
> calling notmuch. This meant that when the structured output was
> slightly changed (in commit 14c60cf168ac3b0f277188c16e6012b7ebdadde7)
> stash filename broke. This fixes this breakage by specifying the
> format-version.
> ---
>
> Bremner pointed out this bug today on irc. In due course we may want
> to use format-version=3 and update the helper functions but as none of
> notmuch-emacs uses the new format version yet this seem the right fix for now.

Pushed to release and master.

collecting bug fixes for a potential 0.24.2

d