the status codes for format version mismatches for commands that
support formatted output.
+Bug fix for checking configured new.tags for invalid tags
+
+ `notmuch new` and `notmuch insert` now check the user configured
+ new.tags for invalid tags, and refuse to apply them, similar to
+ `notmuch tag`. Invalid tags are currently the empty string and tags
+ starting with `-`.
+
Emacs Interface
---------------