gh-92810: Address review fixes

Author: dolfinus

Doc/whatsnew/3.15.rst

@@ -833,7 +833,7 @@ abc
 * Reduce memory usage of :func:`issubclass` checks for classes inheriting abstract classes.
 
   :class:`abc.ABCMeta` hook ``__subclasscheck__`` now includes
-  a guard which is triggered then the hook is called from a parent class
+  a guard which is triggered when the hook is called from a parent class
   (``issubclass(cls, RootClass)`` -> ``issubclass(cls, NestedClass)`` -> ...).
   This guard prevents adding ``cls`` to ``NestedClass`` positive and negative caches,
   preventing memory bloat in some cases (thousands of classes inherited from ABC).

Lib/test/test_abc.py

@@ -12,6 +12,7 @@
 import _py_abc
 from inspect import isabstract
 
+
 def test_factory(abc_ABCMeta, abc_get_cache_token):
     class TestLegacyAPI(unittest.TestCase):
 
@@ -73,22 +74,22 @@ class TestABC(unittest.TestCase):
         def check_isinstance(self, obj, target_class):
             self.assertIsInstance(obj, target_class)
             self.assertIsInstance(obj, (target_class,))
-            self.assertIsInstance(obj, target_class | target_class)
+            self.assertIsInstance(obj, target_class | int)
 
         def check_not_isinstance(self, obj, target_class):
             self.assertNotIsInstance(obj, target_class)
             self.assertNotIsInstance(obj, (target_class,))
-            self.assertNotIsInstance(obj, target_class | target_class)
+            self.assertNotIsInstance(obj, target_class | int)
 
         def check_issubclass(self, klass, target_class):
             self.assertIsSubclass(klass, target_class)
             self.assertIsSubclass(klass, (target_class,))
-            self.assertIsSubclass(klass, target_class | target_class)
+            self.assertIsSubclass(klass, target_class | int)
 
         def check_not_issubclass(self, klass, target_class):
             self.assertNotIsSubclass(klass, target_class)
             self.assertNotIsSubclass(klass, (target_class,))
-            self.assertNotIsSubclass(klass, target_class | target_class)
+            self.assertNotIsSubclass(klass, target_class | int)
 
         def test_ABC_helper(self):
             # create an ABC using the helper class and perform basic checks