anchor.diff:               grammar = [{name = "e"
                            args = []
                            body = PSeq ([{omit = false
  -                                        rule = PToken ("R", (29, 30))
  +                                        rule = PToken ("R", (29, 30, ""))
                                           binding = None
                                           checker = None}],None)
                            _public = true
  
positive.code:                 grammar = [{name = "s"
                              args = []
                              body = PSeq ([{omit = false
                                             rule = PToken ("B", (31, 32))
                                             binding = None
                                             checker = None}],None)
                              _public = true
  
negative.code:                             PSeq(
                                  [{ 
                                      omit = false
                                      rule = PToken ("NUMBER", (4, 10, ""))
                                      binding = None
                                      checker = None
                                  }; { 
                                      omit = false
                                      rule = PToken ("PLUS", (11, 15, ""))
                                      binding = None
                                      checker = None
                                  }; {
                                      omit = false
                                      rule = PToken ("NUMBER", (16, 22, ""))
                                      binding = None
                                      checker = None
                                  }],
  