Merge pull request #3020 from ConnorTroy/connortroy/add-deque-imul

Add deque __imul__ method

vm/src/stdlib/collections.rs

@@ -471,6 +471,16 @@ mod _collections {
             })
         }
 
+        #[pymethod(magic)]
+        fn imul(zelf: PyRef<Self>, value: isize, vm: &VirtualMachine) -> PyResult<PyRef<Self>> {
+            let mul_deque = zelf.mul(value, vm)?;
+            std::mem::swap(
+                &mut *zelf.borrow_deque_mut(),
+                &mut *mul_deque.borrow_deque_mut(),
+            );
+            Ok(zelf)
+        }
+
         #[pymethod(magic)]
         fn len(&self) -> usize {
             self.borrow_deque().len()