Nicolas Petton writes:

> You can use `string-empty-p' from subr-x.el or `seq-empty-p' from
> seq.el (which works on all sequence data types).
>
> seq.el will be included in Emacs 25.1, but in the meantime you can
> install it from GNU Elpa.

BTW, would it be wise to obsolete `string-reverse' and `string-empty-p'
From subr-x in favor of `seq-reverse' and `seq-empty-p' which are much
more generic?

Nico
-- 
Nicolas Petton
http://nicolas-petton.fr