Issue #1717: Remove cmp.  Stage 1: remove all uses of cmp and __cmp__ from
the standard library and tests.
diff --git a/Lib/test/test_heapq.py b/Lib/test/test_heapq.py
index 484ab48..e1e7e9c 100644
--- a/Lib/test/test_heapq.py
+++ b/Lib/test/test_heapq.py
@@ -234,9 +234,9 @@
 
 class CmpErr:
     "Dummy element that always raises an error during comparison"
-    def __cmp__(self, other):
+    def __eq__(self, other):
         raise ZeroDivisionError
-    __eq__ = __ne__ = __lt__ = __le__ = __gt__ = __ge__ = __cmp__
+    __ne__ = __lt__ = __le__ = __gt__ = __ge__ = __eq__
 
 def R(seqn):
     'Regular generator'