resolved local state conflict

src/objects/hit.rs

@@ -80,7 +80,7 @@ impl Hit {
         (self.u, self.v)
     }
 
-    // TODO: use front_face to discard back-hits for culling
+    // TODO (low priority): use front_face to discard back-hits for culling
     pub fn hit_list(hittables: &Vec<Arc<dyn Hittable>>, r: &Ray) -> Option<Hit> {
         let mut closest: Option<Hit> = None;
         for hittable in hittables {