Write self as a string into ns at position pos

Property definitions

core :: bytes $ Int :: add_digest_at
	# Write self as a string into `ns` at position `pos`
	private fun add_digest_at(ns: CString, pos: Int) do
		var tmp = (0xF0 & self) >> 4
		ns[pos] = if tmp >= 0x0A then tmp + 0x37 else tmp + 0x30
		tmp = 0x0F & self
		ns[pos + 1] = if tmp >= 0x0A then tmp + 0x37 else tmp + 0x30
	end
lib/core/bytes.nit:55,2--61,4