question nid 252, revision 253: 4 alternatives, properties {"choice_boolean":"1","choice_multi":"0","choice_random":"0"}
1. round-trip unchanged .......... PASS
2. score edit kept the row id .... PASS (stored 7/0)
3. add alternative ............... PASS (4 -> 5)
4. blanking removes it ........... PASS (5 -> 4)
5. original state restored ....... PASS