added test for issue #678

IPython/core/tests/test_inputsplitter.py

@@ -534,6 +534,12 syntax_ml = \
           ('   ....: ', ''),
           ],
          ],
+
+       multiline_datastructure =
+       [ [('>>> a = [1,','a = [1,'),
+          ('... 2]','2]'),
+         ],
+       ],
        )