Method extend

src/test/java/com/aparapi/codegen/Diff.java:113–116

(int _lhsTo, int _rhsTo)

         }

         public void extend(int _lhsTo, int _rhsTo) {
            lhsTo = _lhsTo;
            rhsTo = _rhsTo;
         }

         public String toString(String[] _lhs, String[] _rhs) {
            StringBuilder sb = new StringBuilder();