update cell magic transform test

IPython/core/tests/test_inputsplitter.py

@@ -451,7 +451,9 b' class IPythonInputTestCase(InputSplitterTestCase):'
         isp = self.isp
         for raw, name, line, cell in [
             ("%%cellm a\nIn[1]:", u'cellm', u'a', u'In[1]:'),
-            ("%%cellm \n...:", u'cellm', u'', u'...:'),
+            ("%%cellm \nline\n>>>hi", u'cellm', u'', u'line\n>>>hi'),
+            (">>>%%cellm \nline\n>>>hi", u'cellm', u'', u'line\nhi'),
+            ("%%cellm \n>>>hi", u'cellm', u'', u'hi'),
             ("%%cellm \nline1\nline2", u'cellm', u'', u'line1\nline2'),
             ("%%cellm \nline1\\\\\nline2", u'cellm', u'', u'line1\\\\\nline2'),
         ]: