Fix error message in objsequence.get_item

Lib/test/list_tests.py

@@ -33,8 +33,6 @@ class CommonTest(seq_tests.CommonTest):
         self.assertNotEqual(id(a), id(b))
         self.assertEqual(a, b)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_getitem_error(self):
         a = []
         msg = "list indices must be integers or slices"

Lib/test/test_tuple.py

@@ -18,8 +18,6 @@ JUST_SHOW_HASH_RESULTS = False # if RUN_ALL_HASH_TESTS, just display
 class TupleTest(seq_tests.CommonTest):
     type2test = tuple
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_getitem_error(self):
         t = ()
         msg = "tuple indices must be integers or slices"

vm/src/obj/objsequence.rs

@@ -252,8 +252,8 @@ pub fn get_item(
         }
     } else {
         Err(vm.new_type_error(format!(
-            "indexing type {:?} with index {:?} is not supported (yet?)",
-            sequence, subscript
+            "{} indices must be integers or slices",
+            sequence.lease_class().name
         )))
     }
 }