def strip!
      rows.each do |row|
        columns.each do |column|
          value = row[column.key]
          if value.respond_to?(:strip)
            row[column.key] = value.strip
          elsif value.is_a?(Float)
            row[column.key] = strip_decimal(value)
          end
        end
      end
    end
def strip!
      rows.each do |row|
        columns.each do |column|
          value = row[column.key]
          if value.respond_to?(:strip)
            row[column.key] = value.strip
          elsif value.is_a?(Float)
            row[column.key] = strip_decimal(value)
          end
        end
      end
    end
Remove preceding and trailing whitespace from all cells. By default, Table does not
 strip whitespace from cells.