anchor.diff:  
       [<Test>]
       member this.``1000: trna in 629-699`` () =
  -        this.``1000: trna`` """simple_tRNA2\g""" 1001 ((0,597),(0,697))
  +        this.``1000: trna`` """simple_tRNA2\g""" 1001 ((0,596),(0,697))
   
       [<Test>]
       member this.``1000: trna in 133-204`` () =
  
positive.code: 
      [<Test>]
      member this.``Very small with 2 edges`` () =        
          this.SmallTests  """very_small_multy_1\g"""  ((0,1),(0,6))
     
      member this.``Very very small tests`` file expectedRange =
          
  
negative.code: 
      [<Test>]
      member this.``Very very small with 2 edges`` () =
          this.``Very very small tests`` """v_very_small_multy\g""" ((0,0),(1,2))        
  
      [<Test>]
      member this.``Very very small`` () =
  