class Diffy::HtmlFormatter

def reconstruct_characters(line_diff, type)
  enum = line_diff.each_chunk.to_a
  enum.each_with_index.map do |l, i|
    re = /(^|\\n)#{Regexp.escape(type)}/
    case l
    when re
      highlight(l)
    when /^ /
      if i > 1 and enum[i+1] and l.each_line.to_a.size < 4
        highlight(l)
      else
        l.gsub(/^./, '').gsub("\n", '').
          gsub('\r', "\r").gsub('\n', "\n")
      end
    end
  end.join('').split("\n").map do |l|
    type + l.gsub('</strong><strong>' , '')
  end
end