anchor.diff:          let rules,start,lbls = generator.GenRulesList il
           let input = [|2us;2us|]
           let res = (new CYKCore()).Recognize (rules,1us) input (fun l1 l2 l3 -> 0uy) lbls
  -        let expected = "undefined 0 0"
  +        let expected = "undefined : label = 0 weight = 0"
           Assert.AreEqual(expected,res)
           
       [<Test>]
  
positive.code:         let rules,start,lbls = generator.GenRulesList il
          let input = [|1us;2us;2us|]
          let res = (new CYKCore()).Recognize (rules,1us) input (fun l1 l2 l3 -> 0uy) lbls
          let expected = "conflict 0 0"
          Assert.AreEqual(expected,res)
  
      [<Test>]
  
negative.code:         let rules,start,lbls = generator.GenRulesList il
          let input = [|1us;1us|]
          let res = (new CYKCore()).Recognize (rules,1us) input (fun l1 l2 l3 -> 0uy) lbls
          let expected = "undefined : label = 0 weight = 0" 
          Assert.AreEqual(expected,res)
  
      [<Test>]
  