# Unescape the content of `self` from CSV format to Nit String
	private fun unescape_csv(delim_char: Char): String do
		var to_un = chars_to_unescape_csv(delim_char)
		if to_un == 0 then return to_s
		var buf = new Buffer.with_cap(byte_length - to_un)
		var pos = 0
		var ln = length
		while pos < ln do
			var c = self[pos]
			if c == delim_char then pos += 1
			buf.add c
			pos += 1
		end
		return buf.to_s
	end