Fix wording

Author: csm10495

Lib/test/list_tests.py

@@ -239,7 +239,7 @@ def test_extended_slice_assign_iterator(self):
         a = self.type2test(range(10))
         with self.assertRaises(ValueError) as cm:
             a[::2] = iter(range(3))
-        self.assertIn("sequence of size 3 to extended slice of larger size",
+        self.assertIn("sequence of size 3 to extended slice of size 5",
                        str(cm.exception))
         self.assertEqual(a, self.type2test(range(10)))
 

Objects/listobject.c

@@ -3915,8 +3915,9 @@ list_ass_subscript_lock_held(PyObject *_self, PyObject *item, PyObject *value)
                     PyErr_Format(PyExc_ValueError,
                         "attempt to assign sequence of "
                         "size %zd to extended slice of "
-                        "larger size",
-                             PySequence_Fast_GET_SIZE(seq));
+                        "size %zd",
+                             PySequence_Fast_GET_SIZE(seq),
+                             slicelength);
                 }
                 else {
                     PyErr_Format(PyExc_ValueError,