Update add_lemma_to_lookup.jape

jape_rules/add_lemma_to_lookup.jape

@@ -16,9 +16,11 @@ Rule: label_mapping
  	gate.Annotation ann = (gate.Annotation) lookup.iterator().next();
  	FeatureMap lookupFeatures = ann.getFeatures();
     gate.AnnotationSet  tokens = outputAS.get("Token", ann.getStartNode().getOffset(), ann.getEndNode().getOffset());
+	List<Annotation> tokensList = new ArrayList<Annotation>(tokens);
+	Collections.sort(tokensList, new gate.util.OffsetComparator());
 	String lemma = "";
- 	for (Annotation token : tokens) {
- 		lemma = lemma + " " + token.getFeatures().get("root").toString();
+	for (Annotation token : tokensList) {
+ 	    lemma = lemma + " " + token.getFeatures().get("root").toString();
  	}
  	lookupFeatures.put("lemma",lemma.trim()); 
 }