Fix a bug in test_dict and test_userdict, found at the PyPy sprint.

 (backport from rev. 54114)

Lib/test/test_dict.py

@@ -430,7 +430,7 @@ class DictTest(unittest.TestCase):
         except RuntimeError, err:
             self.assertEqual(err.args, (42,))
         else:
-            self.fail_("e[42] didn't raise RuntimeError")
+            self.fail("e[42] didn't raise RuntimeError")
         class F(dict):
             def __init__(self):
                 # An instance variable __missing__ should have no effect
@@ -441,7 +441,7 @@ class DictTest(unittest.TestCase):
         except KeyError, err:
             self.assertEqual(err.args, (42,))
         else:
-            self.fail_("f[42] didn't raise KeyError")
+            self.fail("f[42] didn't raise KeyError")
         class G(dict):
             pass
         g = G()
@@ -450,7 +450,7 @@ class DictTest(unittest.TestCase):
         except KeyError, err:
             self.assertEqual(err.args, (42,))
         else:
-            self.fail_("g[42] didn't raise KeyError")
+            self.fail("g[42] didn't raise KeyError")
 
     def test_tuple_keyerror(self):
         # SF #1576657

Lib/test/test_userdict.py

@@ -174,7 +174,7 @@ class UserDictTest(mapping_tests.TestHashMappingProtocol):
         except RuntimeError, err:
             self.assertEqual(err.args, (42,))
         else:
-            self.fail_("e[42] didn't raise RuntimeError")
+            self.fail("e[42] didn't raise RuntimeError")
         class F(UserDict.UserDict):
             def __init__(self):
                 # An instance variable __missing__ should have no effect
@@ -186,7 +186,7 @@ class UserDictTest(mapping_tests.TestHashMappingProtocol):
         except KeyError, err:
             self.assertEqual(err.args, (42,))
         else:
-            self.fail_("f[42] didn't raise KeyError")
+            self.fail("f[42] didn't raise KeyError")
         class G(UserDict.UserDict):
             pass
         g = G()
@@ -195,7 +195,7 @@ class UserDictTest(mapping_tests.TestHashMappingProtocol):
         except KeyError, err:
             self.assertEqual(err.args, (42,))
         else:
-            self.fail_("g[42] didn't raise KeyError")
+            self.fail("g[42] didn't raise KeyError")
 
 ##########################
 # Test Dict Mixin