anchor.diff:  
       include::{targetDir}/contributors/{filename}[] // <4>
   ----
  +.Key:
  +<1> Do not show this section when docs are rendered as PDF.
  +<2> Create an **Improve This Doc** button which links to your GitHub sources.
  +<3> Create a **Create an Issue** button which links to your issue tracker.
  +<4> Include the list of contributors created by this task.
   
  -<1> do not show this section when rendered as PDF
  -<2> create an "improve this doc" button which links to the git sources
  -<3> create a "create-an-issue" button which links to your issue tracker
  -<4> include the list of contributors created by this task
  -
  -== Reading Time
  -
  -The task also appends to the list of contributors the estimated reading time.
  +_(The task automatically adds the estimated reading time to the list of contributors.)_
   
   == File Attributes
   
  -The task now also exports some attributes of the git files.
  +This task also exports some GitHub file attributes.
   The extracted attributes are stored in `{targetDir}/fileattribs/{filename}`.
   
   [source,asciidoc]
  
positive.code: :lastMessage: #310 started to document config options
  ----
  
  This enables you to import these attributes the same way you import the contributors list and use these attributes.
  
  Here is an example:
  
  .feedback.adoc
  [source,asciidoc,indent=0]
  
negative.code: 
  include::../_feedback.adoc[]
  
  == About This Task
  
  This task crawls through all Asciidoctor source files and extracts a list of contributors, which is then rendered as AsciiDoc images of each contributor's gravatar picture.
  The extracted list is stored in `{targetDir}/contributors/{filename}` so it can be easily included in your documents.
  
  == How to Use This Task
  
  The best way to use this task is to create a `feedback.adoc` file similar to this:
  
  .feedback.adoc
  [source,asciidoc,indent=0]
  