Switch the get_loop_elements implementation to only return populated arrays when its an array-like object.

src/renderer/iteration_context.rs

@@ -54,7 +54,7 @@ impl Loopable for IterationContext {
         // TODO: Would this even ever be called? Won't matter, but I'd
         // like to know. Since it is injected 1 above the current
         // context, we wouldn't be able to access it with `{.}`.
-        vec![self]
+        Vec::new()
     }
 }