# Return a string where Nit escape sequences are transformed.
	#
	# ~~~
	# var s = "\\n"
	# assert s.length        ==  2
	# var u = s.unescape_nit
	# assert u.length        ==  1
	# assert u.chars[0].code_point      ==  10 # (the ASCII value of the "new line" character)
	# ~~~
	fun unescape_nit: String
	do
		var res = new Buffer.with_cap(self.length)
		var was_slash = false
		for i in [0..length[ do
			var c = chars[i]
			if not was_slash then
				if c == '\\' then
					was_slash = true
				else
					res.add(c)
				end
				continue
			end
			was_slash = false
			if c == 'n' then
				res.add('\n')
			else if c == 'r' then
				res.add('\r')
			else if c == 't' then
				res.add('\t')
			else if c == '0' then
				res.add('\0')
			else
				res.add(c)
			end
		end
		return res.to_s
	end