Note, not TODO

Author: nathanrw

src/Arch/Core/World.cs

@@ -625,7 +625,7 @@ public void DuplicateN(Entity sourceEntity, int n, Span<Entity> outputSpan)
         Debug.Assert(IsAlive(sourceEntity));
         Debug.Assert(n > 0);
         Debug.Assert(n <= outputSpan.Length);
-        // TODO: this could be optimised by getting the chunks and using
+        // Note: this could be optimised by getting the chunks and using
         // Array.Fill(), assuming we could guarantee writing to the end of the
         // chunk.
         for (int i = 0; i < n; ++i)