anchor.diff:  }
   ----
   
  +.Reset indent
  +[source,kotlin,indent=0]
  +----
  +    fun sum(a: Int, b: Int): Int {
  +        return a + b
  +    }
  +----
  +
   .AsciiDoc in AsciiDoc
   [source,asciidoc]
   ----
  
positive.code: 
  toc::[]
  
  hello. <<Allo hello()>>
  
  == Extensions
  
  
negative.code: ```
  
  .Tab size
  [source,java,tabsize=2]
  ----
  @Main(title="Main")
  public class Main {
  