private void SplitBySeparator(string separator, int lineIndex)
        {
            if (Line.TrimmedLine(lines[lineIndex]) == separator)
            {
                return;
            }
            string previousLine = null;

            if (lineIndex != 0)
            {
                previousLine = lines[lineIndex - 1];
            }
            if (lines[lineIndex].Contains(separator))
            {
                Split.InsertInsteadOf(lineIndex, ref lines, Split.DistinguishSeparator(separator, lines[lineIndex], previousLine));
            }
        }