anchor.diff:  
   In order to embed an image into a PDF, Asciidoctor PDF must understand how to read it.
   To perform this work, Asciidoctor delegates to the underlying libraries.
  -{uri-prawn}[Prawn] provides support for reading JPG and PNG images.
  -{uri-prawn-svg}[prawn-svg] brings support for SVG images.
  +{url-prawn}[Prawn] provides support for reading JPG and PNG images.
  +{url-prawn-svg}[prawn-svg] brings support for SVG images.
   Without any additional libraries, those are the only supported image file formats.
   
  -If you need support for additional image formats, such as GIF, TIFF, or interlaced PNG--and you don't want to convert those images to a supported format--you must install the {uri-prawn-gmagick}[prawn-gmagick] (>= 0.0.9) Ruby gem.
  -prawn-gmagick is an extension for Prawn based on {uri-graphicsmagick}[GraphicsMagick] that adds support for all the image formats recognized by that library.
  +If you need support for additional image formats, such as GIF, TIFF, or interlaced PNG--and you don't want to convert those images to a supported format--you must install the {url-prawn-gmagick}[prawn-gmagick] (>= 0.0.9) Ruby gem.
  +prawn-gmagick is an extension for Prawn based on {url-graphicsmagick}[GraphicsMagick] that adds support for all the image formats recognized by that library.
   prawn-gmagick has the added benefit of significantly reducing the time it takes to generate a PDF containing a lot of images.
   
   The prawn-gmagick gem uses native extensions to compile against GraphicsMagick.
   This system prerequisite limits installation to Linux and OSX.
  -Please refer to the {uri-prawn-gmagick}[README for prawn-gmagick] to learn how to install it.
  +Please refer to the {url-prawn-gmagick}[README for prawn-gmagick] to learn how to install it.
   
   Once this gem is installed, Asciidoctor automatically switches over to it to handle embedding of all images.
   In addition to support for more additional image file formats, this gem also speeds up image processing considerably, so we highly recommend using it if you can.
  
positive.code: 
   $ asciidoctor-pdf -r asciidoctor-mathematical -a mathematical-format=svg sample.adoc
  
  Refer to the {uri-asciidoctor-mathematical}#readme[README] for Asciidoctor Mathematical to learn about additional settings and options.
  
  == Skipping Passthrough Content
  
  
negative.code: 
  == Fonts in SVG Images
  
  Asciidoctor PDF uses {url-prawn-svg}[prawn-svg] to embed SVGs in the PDF document, including SVGs generated by Asciidoctor Diagram.
  
  Actually, it's not accurate to say that prawn-svg embeds the SVG.
  Rather, prawn-svg is an SVG _renderer_.
  