chore: canonical copy impl works

src/double/node.rs

@@ -45,16 +45,8 @@ impl<T> Deref for NodeInner<'_, T> {
 
 impl<T> Copy for NodeBackPtr<'_, T> {}
 impl<T> Clone for NodeBackPtr<'_, T> {
-    // # TODO: check if this works as expected with the cacnonical clone impl as I'm not sure if
-    // Copy would make it recursive or not
-    #[allow(clippy::enum_glob_use, clippy::non_canonical_clone_impl)]
     fn clone(&self) -> Self {
-        use NodeBackPtr::*;
-
-        match self {
-            Head(h) => Head(h),
-            Node(n) => Node(n),
-        }
+        *self
     }
 }
 type WriteAndBackDoublet<'ll, T> = (