# File lib/spreadsheet/excel.rb, line 71
    def write_row row, col, data=nil, format=nil
      if data.is_a? Array
        data.each do |token|
          if token.is_a? Array
            write_column row, col, token, format
          else
            write row, col, token, format
          end
          col += 1
        end
      else
        write row, col, data, format
      end
    end