forgot to set doctest flag while fixing test

tests/run/tp_new.pyx

@@ -120,7 +120,7 @@ def make_new_args(type t1=None, type t2=None):
 @cython.test_fail_if_path_exists('//PythonCapiCallNode')
 def make_new_none_typed(tuple t=None):
     """
-    >>> make_new_none_typed()
+    >>> make_new_none_typed()  # doctest: +ELLIPSIS
     Traceback (most recent call last):
     TypeError: ...__new__(X): X is not a type object (NoneType)
     """