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: === Diagram Attributes
  
  Certain diagram types allow image generation to be customized using attributes.
  Each attribute can be specified either at the block level or at the document level.
  This is illustrated for the blockdiag `fontpath` attribute in the example below.
  
  ----
  
negative.code: |background      |FFFFFF          |The background colour of the image. The format should be a six-digit hexadecimal number (as in HTML, FF0000 for red). Pass an eight-digit hex to define transparency.
  |css             |unspecified     |Path to a CSS file to pass to mermaid.
  |config          |unspecified     |Path to a JSON config file to pass to mermaid.
  |gantt-config    |unspecified     |Path to a gantt config file to pass to mermaid.
  |puppeteer-config|unspecified     |Path to a puppeteer config file to pass to mermaid.
  |sequence-config |unspecified     |Path to a sequence config file to pass to mermaid.
  |theme           |unspecified     |Theme of the chart, could be default, forest, dark or neutral.
  |width           |unspecified     |Width of the page.
  |height          |unspecified     |Height of the page.
  