objint __pos__ returns Int object

This fixes test_bool.test_math

Author: palaviv

Lib/test/test_bool.py

@@ -51,8 +51,6 @@ def test_float(self):
         self.assertEqual(float(True), 1.0)
         self.assertIsNot(float(True), True)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_math(self):
         self.assertEqual(+False, 0)
         self.assertIsNot(+False, False)

vm/src/obj/objint.rs

@@ -462,8 +462,8 @@ impl PyInt {
     }
 
     #[pymethod(name = "__pos__")]
-    fn pos(zelf: PyRef<Self>, _vm: &VirtualMachine) -> PyIntRef {
-        zelf
+    fn pos(&self, _vm: &VirtualMachine) -> BigInt {
+        self.value.clone()
     }
 
     #[pymethod(name = "__float__")]