Add correct GitHub references

Author: johnslavik

Lib/functools.py

@@ -1060,12 +1060,14 @@ def __init__(self, unbound, obj, cls):
         # Set instance attributes which cannot be handled in __getattr__()
         # because they conflict with type descriptors.
         func = unbound.func
+
         # Dispatch on the second argument if a generic method turns into
-        # a bound method on instance-level access.
+        # a bound method on instance-level access. See GH-143535.
         if obj is None and isinstance(func, FunctionType):
             self._skip_bound_arg = True
         else:
             self._skip_bound_arg = False
+
         try:
             self.__module__ = func.__module__
         except AttributeError:

Lib/test/test_functools.py

@@ -3006,7 +3006,7 @@ def static_func(arg: int) -> str:
         self.assertEqual(A().static_func.__name__, 'static_func')
 
     def test_method_classlevel_calls(self):
-        """Regression test for GH-144615."""
+        """Regression test for GH-143535."""
         class C:
             @functools.singledispatchmethod
             def generic(self, x: object):