[PATCH v3] emacs: support "notmuch new" as a notmuch-poll-script

[Austin Clements]

Quoth Jani Nikula on Dec 12 at 11:13 pm:
> On Tue, 13 Dec 2011 00:53:05 +0400, Dmitry Kurochkin <dmitry.kurochkin at gmail.com> wrote:
> > On Mon, 12 Dec 2011 22:50:04 +0200, Jani Nikula <jani at nikula.org> wrote:
> > > +If set to nil (the default), new mail is processed by invoking
> > > +\"notmuch new\". Otherwise, this should be set to a string that
> > > +gives the name of an external script that processes new mail. If
> > > +set to the empty string, no command will be run.
> > 
> > I think this should be "an empty string".  But I may be mistaking.
> 
> Shameless copy paste from a native speaker, who am I to argue? :)
> Austin?

Either way is grammatically correct.  Really, this is a philosophical
question.  Can two empty strings have different identities?  Or is
there only one empty string in the universe?

(eq "" "") => t
(eq "" (string)) => t
(eq "" (make-string 0 ?a)) => t
(eq "" (substring "a" 1)) => t

It would appear Elisp is squarely in the "there is one empty string"
camp, so "the empty string" would be more correct.