Extract #format_guide method from Guides#load_guide.

    def load_all_guides

      each_item do |guide|

        guide["url"] = resolve_url(guide)

        guide[:filename] = guide["url"] + "/README.md"

        guide[:html] = load_guide(guide)

      end

    end

    def load_guide(guide)

      return Logger.warn(:guide, "Guide not found", guide["url"]) unless File.exists?(guide["url"])

      guide_file = guide["url"] + "/README.md"

      return Logger.warn(:guide, "Guide not found", guide_file) unless File.exists?(guide_file)

      return Logger.warn(:guide, "Guide not found", guide[:filename]) unless File.exists?(guide[:filename])

      begin

        @formatter.doc_context = {:filename => guide_file, :linenr => 0}

        return format_guide(guide)

      rescue

        Logger.fatal_backtrace("Error while reading/formatting guide #{guide['url']}", $!)

        exit(1)

      end

    end

    def format_guide(guide)

      @formatter.doc_context = {:filename => guide[:filename], :linenr => 0}

      @formatter.images = Img::Dir.new(guide["url"], "guides/#{guide["name"]}")

        html = add_toc(guide, @formatter.format(Util::IO.read(guide_file)))

      html = add_toc(guide, @formatter.format(Util::IO.read(guide[:filename])))

      # Report unused images (but ignore the icon files)

      @formatter.images.get("icon.png")

      @formatter.images.report_unused

      return html

      rescue

        Logger.fatal_backtrace("Error while reading/formatting guide #{guide['url']}", $!)

        exit(1)

      end

    end

    def write_guide(guide, dir)