def wrap(num_lines)
      cleaned = gsub(/\s+/, ' ').strip

      chars_per_line = cleaned.size / num_lines.to_f

      lines = []
      cleaned.split.each do |word|
        if lines.empty?
          lines << word
        else
          if (lines[-1].size + 1 + word.size) <= chars_per_line ||
              lines.size >= num_lines
            lines[-1] << ' ' unless lines[-1].empty?
            lines[-1] << word
          else
            lines << word
          end
        end
      end

      Caption.new(lines.join("\n"))
    end
def wrap(num_lines)
      cleaned = gsub(/\s+/, ' ').strip

      chars_per_line = cleaned.size / num_lines.to_f

      lines = []
      cleaned.split.each do |word|
        if lines.empty?
          lines << word
        else
          if (lines[-1].size + 1 + word.size) <= chars_per_line ||
              lines.size >= num_lines
            lines[-1] << ' ' unless lines[-1].empty?
            lines[-1] << word
          else
            lines << word
          end
        end
      end

      Caption.new(lines.join("\n"))
    end
Wrap the string of into num_lines lines.