Implement the second parsing pass.

src/parser/parser_context.rs

@@ -140,7 +140,7 @@ pub enum ContextElement<'r, 's> {
     /// If any are found, this will force a 2nd parse through the
     /// org-mode document since text needs to be re-parsed to look for
     /// radio links matching the contents of radio targets.
-    RadioTarget(Vec<Vec<Object<'s>>>),
+    RadioTarget(Vec<&'r Vec<Object<'s>>>),
 }
 
 pub struct ExitMatcherNode<'r> {