get flat output in Maxima

I think I've written before this before but a search didn't turn it up. This just concerns getting "flat", all-on-one-line, non-fancy ASCII output from Maxima. (This is especially useful when the output is destined to be converted into C code.)

(%i8) display2d: false$
(%i9) %e^t;

(%o9) %e^t
(%i10) display2d: true$
(%i11) %e^t
;
                                        t
(%o11)                                %e