Does this mean that if there is *any* output, we default back to the old way?  How long will the deprecation last?

My concern is that I typically develop the code in a cell server page, printing out what I am returning.  If I copy that in, then the output will trigger this old way of doing things, which will cause probably pretty strange errors.  Also, on occasion, I can't help some internal Sage code from printing out something (I think).  That would cause problems here if I want to use the new return way.

If not many people are using askSage yet, it might be better to make a clean break.  Maybe pass back the stdout as a special key so minimal modification will get existing problems to work again.

But....you guys are the ones to make the decision, of course.