anchor.diff:  ....
   ....
   ----
  -<1> Block level attributes can be specified at the document level by prefixing them with `<blocktype>-`
  -<2> The first diagram does not specify an explicit value for `fontpath` so the global value will be used
  -<3> The second diagram specifies a `fontpath` value which overrrides the global value
  +<1> Attributes can be specified for all diagram of a certain type at the document level by prefixing them with `<blocktype>-`.
  +    In this example, the `fontpath` attribute is specified for all diagrams of type `blockdiag`.
  +<2> The first diagram does not specify an explicit value for `fontpath` so the global `blockdiag-fontpath` value will be used
  +<3> The second diagram does specifie a `fontpath` value.
  +    This overrides the global `blockdiag-fontpath` value.
   
   Each attribute can either be specified at the block level or at the document level.
   The attribute name at the block level should be prefixed with the name of the diagram type and a dash.
  +
  +==== Shared Attributes
  +
  +[cols=">,<,<",options="header"]
  +|===
  +|Name         |Default value   |Description
  +|svg-type     |unspecified     |One of `static`, `inline` or `interactive`. This determines the style of SVG embedding that's used in certain backends. The https://asciidoctor.org/docs/user-manual/#taming-svgs[asciidoctor user guide] describes this in more detail.
  +|===
   
   ==== AsciiToSVG
   
  
positive.code: [cols=">,<,<",options="header"]
  |===
  |Name          |Default value |Description
  |fillColor     |white         |The fill color for the text.
  |strokeColor   |black         |The outline color for the text
  |strokeWidth   |2             |The width of the text outline.
  |font          |Impact        |The font face to use for the text.
  |options       |unspecified   |a comma separate list of flags that modify the image rendering. Currently only `noupcase` is supported which disable upper casing the labels.
  |===
  
negative.code: === Diagram Attributes
  
  Certain diagram types allow image generation to be customized using attributes.
  Each attribute can be specified per individual diagram block or for all blocks of a given diagram type in a document level.
  This is illustrated for the blockdiag `fontpath` attribute in the example below.
  
  ----
  