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

src/renderer/renderer.rs

@@ -545,11 +545,7 @@ mod tests {
 
     impl Loopable for String {
         fn get_loop_elements(&self) -> Vec<&dyn ContextElement> {
-            if self.is_empty() {
-                Vec::new()
-            } else {
-                vec![self]
-            }
+            Vec::new()
         }
     }
 
@@ -590,7 +586,7 @@ mod tests {
 
     impl Loopable for u64 {
         fn get_loop_elements(&self) -> Vec<&dyn ContextElement> {
-            vec![self]
+            Vec::new()
         }
     }
 
@@ -640,7 +636,7 @@ mod tests {
 
     impl<I: 'static + ContextElement + Clone> Loopable for HashMap<String, I> {
         fn get_loop_elements(&self) -> Vec<&dyn ContextElement> {
-            vec![self]
+            Vec::new()
         }
     }