anchor.diff:  [source,groovy]
   ----
   @GrabConfig(systemClassLoader=true)
  -@Grab(group='org.asciidoctor', module='asciidoctorj-groovy-dsl', version='1.0.0.preview1') // <1>
  +@Grab(group='org.asciidoctor', module='asciidoctorj-groovy-dsl', version='1.0.0.preview2') // <1>
   import org.asciidoctor.groovydsl.AsciidoctorExtensions
   import org.asciidoctor.Asciidoctor
   
  
positive.code: }
  ----
  
  
negative.code: 
  === IncludeProcessor
  
  IncludeProcessor extensions are registered using the function `include_processor`.
  The options must contain an entry for the key `filter` that points to a closure that decides whether to call this extension for the current include macro.
  
  The following example registers for all include macros that include resource starting with `http`.
  