anchor.diff:  
       [<Test>]
       member this.``Very very small with 2 edges`` () =
  -        this.``Very very small tests`` """v_very_small_multy\g""" ((0,0),(0,3))        
  +        this.``Very very small tests`` """v_very_small_multy\g""" ((0,0),(1,2))        
   
       [<Test>]
       member this.``Very very small`` () =
  
positive.code:     //t.``1000: trna in 860-930``()
      //t.``1000: trna in 629-699``()
      //t.``1000: trna in 133-204``()
      //t.``1000 as graph 139 + 861: trna in 133-204`` ()
      //t.``Very small``()
      //t.``Very small with 2 edges``()
      t.``Very very small with 2 edges``()
      //t.``Very very small``()
      //t.``Problem with shift. Big`` ()
      
  
negative.code: 
      [<Test>]
      member this.``1000: trna in 629-699`` () =
          this.``1000: trna`` """simple_tRNA2\g""" 1001 ((0,596),(0,697))
  
      [<Test>]
      member this.``1000: trna in 133-204`` () =
  