Box::deref makes the EDN rendering examples really work!

edn/examples/edn02.rs

@@ -14,7 +14,11 @@ pub struct Example;
 
 impl EdnLayout<Tui> for &Example {
     fn get_content <'a> (&'a self, sym: &'a str) -> RenderBox<'a, Tui> {
-        Box::new(Thunk::new(move||if sym == ":hello" { "Hello world!" } else { "" }))
+        Box::new(Thunk::new(move||match sym {
+            ":hello" => "Hello",
+            ":world" => "world",
+            _ => ""
+        }))
     }
 }