anchor.diff:  
   or in String form like so
   
  -.build.gradle
  -[source,groovy]
  +[source,groovy]
  +.build.gradle
   ----
   options = [
       attributes: 'toc=right source-highlighter=coderay toc-title=Table\\ of\\ Contents'
  
positive.code: 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
  
   * .asciidoc
   * .adoc
   * .asc
   * .ad
  
  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
  
negative.code: 
  == Usage
  
  The plugin adds a new task named `asciidoctor`. This task exposes a few properties as part of its configuration.
  
  [horizontal]
  sourceDir:: where the asciidoc sources are. Type: File. Default: `src/asciidoc`.
  