anchor.diff:  gemPath:: one or more gem installation directories (separated by the system path separator). Type: String. Default: `null`
   requires:: a set of Ruby modules to be included. Type: Set<String>. Default: empty.
   
  -Sources may have any of the following extensions in order to be discovered
  +Sources may have any of the following extensions in order to be discovered:
   
    * .asciidoc
    * .adoc
    * .asc
    * .ad
   
  -The following attributes are automatically set by the `Asciidoctor` task
  +The following attributes are automatically set by the `asciidoctor` task:
   
    * project-name : matches `$project.name`
    * project-version: matches `$project.version` (if defined). Empty String value if undefined
  
positive.code: ]
  ----
  
  The value of `attributes` my be specified as a Map, List, Array or String, for example the following Map definition
  
  .build.gradle
  [source,groovy]
  ----
  options = [
      attributes: [
  
negative.code: 
  Use the following snippet inside a Gradle build file:
  
  [source,groovy]
  [subs="attributes"]
  .build.gradle
  ----
  buildscript {
      repositories {
  