Revision history of "an empty string is not a natural number" (Z13498)

Dif seleshon: Mak di redio botin-dem wey dey di rivishon-dem to kompie-am an mek you hit enta or di botin wey dey for botom.
Wetin e min: (di one wey dey now) = difrens wey dey for di last rivishon, (bifo) = difrens wey dey for rivishon wey kom bifo dis one, m = smol smol chenj.