Added documentation for macroexpand
Added documentation for macroexpand

larme/hy,kirbyfan64/hy,ALSchwalm/hy,kartikm/hy,adamfeuer/hy,zackmdavis/hy,michel-slm/hy,farhaven/hy,Foxboron/hy,farhaven/hy,aisk/hy,paultag/hy,algernon/hy,mtmiller/hy,aisk/hy,larme/hy,timmartin/hy,larme/hy,tianon/hy,tianon/hy,freezas/hy,tuturto/hy,aisk/hy,Tritlo/hy,farhaven/hy,kirbyfan64/hy,Foxboron/hy,jakirkham/hy,tianon/hy,gilch/hy