(let* ((current-tags (notmuch-show-get-tags))
(new-tags (notmuch-update-tags current-tags tag-changes)))
(unless (equal current-tags new-tags)
(let* ((current-tags (notmuch-show-get-tags))
(new-tags (notmuch-update-tags current-tags tag-changes)))
(unless (equal current-tags new-tags)