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

src/renderer/context_element.rs

@@ -30,13 +30,12 @@ pub trait Renderable {
 pub trait Loopable {
     /// Return the elements for a Dust section
     ///
-    /// Sections in dust are accomplished with the {#path} syntax. A
-    /// section has a truthiness check performed on it. If that
-    /// truthiness check fails, then it will render the
-    /// else-block. Otherwise if its a scalar value it will render
-    /// once with the context being the element at that path. Finally,
-    /// if its an array-like value then it will render n-times, once
-    /// for each element of the array.
+    /// Sections in dust are accomplished with the {#path} syntax.  If
+    /// its an array-like value then it will render n-times, once for
+    /// each element of the array. If this is a scalar value, then
+    /// return an empty array. Sections with scalar values will still
+    /// be rendered (only once) if their truthiness check comes back
+    /// true.
     fn get_loop_elements(&self) -> Vec<&dyn ContextElement>;
 }