Finished transitioning to the new top-level ignored whitespace template element.

src/renderer/renderer.rs

@@ -85,10 +85,8 @@ impl<'a> DustRenderer<'a> {
         let mut output = String::new();
         for elem in &body.elements {
             match elem {
-                TemplateElement::TESpan(span) => span
-                    .contents
-                    .iter()
-                    .for_each(|line: &&str| output.push_str(line)),
+                TemplateElement::TEIgnoredWhitespace(_) => {}
+                TemplateElement::TESpan(span) => output.push_str(span.contents),
                 TemplateElement::TETag(dt) => {
                     output.push_str(&self.render_tag(dt, context)?);
                 }