Derive Clone for IslandManager

also fix typo

src/dynamics/island_manager.rs

@@ -9,6 +9,7 @@ use crate::math::Real;
 /// Structure responsible for maintaining the set of active rigid-bodies, and
 /// putting non-moving rigid-bodies to sleep to save computation times.
 #[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+#[derive(Clone)]
 pub struct IslandManager {
     pub(crate) active_dynamic_set: Vec<RigidBodyHandle>,
     pub(crate) active_kinematic_set: Vec<RigidBodyHandle>,

src/geometry/collider.rs

@@ -26,7 +26,7 @@ pub struct Collider {
     pub(crate) co_material: ColliderMaterial,
     pub(crate) co_flags: ColliderFlags,
     pub(crate) co_bf_data: ColliderBroadPhaseData,
-    /// User-defined data associated to this rigid-body.
+    /// User-defined data associated to this collider.
     pub user_data: u128,
 }