anchor.diff:     (horizontal-scroll-distance
       50
       :type integer
  -    :documentation "Horizontal scroll distance. The
  -distance scroll-left or scroll-right will scroll.")
  +    :documentation "Horizontal scroll distance. The distance scroll-left or
  +scroll-right will scroll.")
      (current-zoom-ratio
       1.0
       :type float
  
positive.code: (define-class document-buffer (buffer)
    ((document-model-delta-threshold
      10
      :documentation "Update the document model when the amount of elements on the
      page change greater than this amount."
      :export nil)
     (document-model
      nil
  
negative.code:    (search-always-auto-complete-p
      t
      :type boolean
      :documentation "Whether auto-completion acts on non-prefixed searches.
  Suggestions are computed by the default search engine.")
     (keep-search-hints-p
      t
      :type boolean
      :documentation "Whether to keep search hints when the search prompt for the
  `search-buffer' command is closed.")
     (scroll-distance
      50
      :type integer
  