Fix repr for union

Lib/test/test_types.py

@@ -929,8 +929,6 @@ class UnionTests(unittest.TestCase):
         assert typing.Optional[int] | str == typing.Union[int, str, None]
         assert typing.Union[int, bool] | str == typing.Union[int, bool, str]
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_or_type_repr(self):
         assert repr(int | str) == "int | str"
         assert repr((int | str) | list) == "int | str | list"

vm/src/builtins/union.rs

@@ -43,7 +43,7 @@ impl PyUnion {
     #[pymethod(magic)]
     fn repr(&self, vm: &VirtualMachine) -> PyResult<String> {
         fn repr_item(obj: PyObjectRef, vm: &VirtualMachine) -> PyResult<String> {
-            if vm.is_none(&obj) {
+            if obj.is(vm.ctx.types.none_type) {
                 return Ok("None".to_string());
             }