adapt doctest to semantic change in Py3.5 (due to PEP 448)

tests/run/dict.pyx

+import sys
+
+IS_PY35 = sys.version_info >= (3, 5)
+
+
 def empty():
     """
     >>> empty()
@@ -98,7 +103,7 @@ def item_creation_sideeffect(L, sideeffect, unhashable):
     >>> {1:2, sideeffect(2): 3, 3: 4, unhashable(4): 5, sideeffect(5): 6}  # doctest: +ELLIPSIS
     Traceback (most recent call last):
     TypeError: ...unhashable...
-    >>> L
-    [2, 4]
+    >>> L if IS_PY35 else (L + [5])
+    [2, 4, 5]
     """
     return {1:2, sideeffect(2): 3, 3: 4, unhashable(4): 5, sideeffect(5): 6}