const math/big.digits

5 uses

	math/big (current package)
		natconv.go#L18: const digits = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
		natconv.go#L295: 				s[i] = digits[w&mask]
		natconv.go#L309: 				s[i] = digits[w&mask]
		natconv.go#L320: 			s[i] = digits[w&mask]
		natconv.go#L424: 				s[i] = digits[r%b]