Tidier string type check for eval
Tidier string type check for eval

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