docs: add another `derive` for `Copy`able struct

This adds another `derive` for a `Copy`able struct, so that we are
consistent with `derive` annotations.

diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs
index f113f9392301aa391fb7e9a78f5a782e856392a6..9326aaf56847c577f59e2e86b299f9c67bf6082f 100644 (file)
--- a/library/core/src/marker.rs
+++ b/library/core/src/marker.rs
@@ -291,6 +291,7 @@ pub trait StructuralEq {
 ///
 /// ```
 /// # #[allow(dead_code)]
+/// #[derive(Copy, Clone)]
 /// struct Point {
 ///    x: i32,
 ///    y: i32,