Some nodes stay orphans if they are replaced by another one and followed

by a modification. This patch address this issue.

ERP5Diff.py

@@ -581,6 +581,8 @@ class ERP5Diff:
         path_list = self._makeRelativePathList(old_list)
         new_start = 0
         new_len = len(new_list)
+        # Usefull set to detect orphan in new_list
+        new_object_left_index_set = set()
         for old_node, node_path in zip(old_list, path_list):
           child_path = self._concatPath(path, node_path)
           for new_current in range(new_start, new_len):
@@ -589,13 +591,24 @@ class ERP5Diff:
               self._testAttributes(old_node, new_node, child_path)
               self._compareChildNodes(old_node, new_node, child_path)
               new_start = new_current + 1
+              if new_current in new_object_left_index_set:
+                new_object_left_index_set.remove(new_current)
               break
+            else:
+              new_object_left_index_set.add(new_current)
           else:
             # There is no matching node. So this element must be removed.
             self._xupdateRemoveElement(child_path, old_node.nsmap)
         if new_len > new_start:
           # There are remaining nodes in the new children.
           self._xupdateAppendElements(new_list[new_start:new_len], path)
+          # if New children are allready added, clean up new_object_left_index_set
+          [new_object_left_index_set.remove(index)\
+           for index in range(new_start, new_len) if\
+           index in new_object_left_index_set]
+        if new_object_left_index_set:
+          self._xupdateAppendElements([new_list[index] for index \
+                                           in new_object_left_index_set], path)
         if misplaced_node_dict:
           self._xupdateMoveElements(misplaced_node_dict, path)