Merge pull request #2954 from eldpswp99/add-deque.__copy__

add deque.__copy__

Lib/test/test_deque.py

@@ -719,8 +719,6 @@ class TestBasic(unittest.TestCase):
         self.assertNotEqual(id(d), id(e))
         self.assertNotEqual(list(d), list(e))
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_copy(self):
         mut = [10]
         d = deque([mut])

vm/src/stdlib/collections.rs

@@ -172,6 +172,7 @@ mod _collections {
             self.borrow_deque_mut().clear()
         }
 
+        #[pymethod(magic)]
         #[pymethod]
         fn copy(&self) -> Self {
             PyDeque {