[ESS] Interactive SAS mode hangs

[Sparapani, Rodney]

> 
> I'm submitting with 'Eval paragraph & step', C-c C-p. I place my cursor at the start of the paragraph and hit
> C-c C-p, and it hangs; it also hangs if I highlight the paragraph first. I've also tried with <C-Return> as
> you suggest, as well as menu commands "Eval region | func | para" (C-M-x) and "Eval region | func | para &
> step" (C-c C-c). Hangs every time. The one exception is that if I don't highlight the region, <C-Return>
> will successfully run one line and then allow me to run another, instead of hanging. So I guess that's
> information. Basically it seems incapable of reading more than one line at a time, for whatever reason.

Unfortunately, I can reproduce that with M-x SAS: only one line at a
time works.  But that is definitely a bug since with 
M-x ess-sas-interactive I can submit regions, paragraphs, etc.  So I
made a bug report https://github.com/emacs-ess/ESS/issues/249