anchor.diff:                   :content "' '"
                    :position "absolute"
                    :width "1px"
  +                 :background-color "#000"
                    :top "5px"
                    :bottom "-12px"
                    :left "-10px")
  
positive.code:                                   (htree:current history))))
             (tree-style
               (cl-css:css
                '((* :margin 0
                     :padding 0
                     :list-style "none")
                  ("ul li"
  
negative.code:                  :top "12px"))))
             (content (markup:markup
                       (:body (:h1 "History")
                              (:style (style output-buffer))
                              (:style (markup:raw tree-style))
                              (:div (markup:raw
                                     (markup:markup*
  