Raise more appropriate error on missing kwarg value
Raise more appropriate error on missing kwarg value

timmartin/hy,Tritlo/hy,kartikm/hy,ALSchwalm/hy,tuturto/hy,adamfeuer/hy,michel-slm/hy,paultag/hy,jakirkham/hy,algernon/hy,freezas/hy,gilch/hy