gh-92810: Fix linter errors

Author: dolfinus

Lib/_py_abc.py

@@ -144,7 +144,7 @@ def __subclasscheck__(cls, subclass):
         # Check if it's a subclass of a subclass (recursive)
         for scls in cls.__subclasses__():
             # If inside recursive issubclass check, avoid adding classes to any cache because this
-            # may drastically increase memory usage. 
+            # may drastically increase memory usage.
             # Unfortunately, issubclass/__subclasscheck__ don't accept third argument with context,
             # so using global context within ABCMeta.
             # This is done only on first method call, others will use cached result.

Lib/test/test_abc.py

@@ -503,7 +503,7 @@ def __subclasses__(cls):
 
             class Parent2(metaclass=abc_ABCMeta):
                 __subclasses__ = lambda: [A]
-        
+
             # trigger caching
             for _ in range(2):
                 self.assertIsInstance(A(), Parent1)

Modules/_abc.c

@@ -578,8 +578,6 @@ _abc__abc_register_impl(PyObject *module, PyObject *self, PyObject *subclass)
     if (result < 0) {
         return NULL;
     }
-
-    /* Actual registration */
     _abc_data *impl = _get_impl(module, self);
     if (impl == NULL) {
         return NULL;