anchor.diff:              headline |> should not' (equal None)
               headline |> Option.map(fun x -> x.Text) |> should equal (Some(""))
   
  -        [<Test>]
  +        [<When>]
           let ``<When> RETURN is pressed after a headline <Then> a new body text block is started`` () =
               let doc = new FlowDocument(new Paragraph(new Headline("headline")))
   
  
positive.code: 
      [<Scenario>]
      module ``Given a Hyperlink`` =
          [<Test>]
          let ``<When> BACKSPACE is entered <Then> clickable hyperlink is removed`` () =
              let document = new FlowDocument(new Paragraph(new Run("Some dummy http://github.org/")));
  
  
negative.code: 
      [<Scenario>]
      module ``Given an unknown Ascii symbol`` =
          [<When>]
          let ``<When> entered <Then> no symbol is inserted`` () =
              let document = new FlowDocument(new Paragraph(new Run("Some dummy text")));
  
  