# File lib/wrongdoc/history.rb, line 39
  def old_summaries
    @old_summaries ||= if File.exist?(".CHANGELOG.old")
      File.readlines(".CHANGELOG.old").inject({}) do |hash, line|
        version, summary = line.split(/ - /, 2)
        hash[version] = summary
        hash
      end
    else
      {}
    end
  end