cleanup, docs

site/doc/pages/session_destroy.txt

@@ -12,7 +12,8 @@ Deletes the cookie specified by `session_name` and clears the data stored under
 
 This also empties `context.session_id` and `context.session`.
 
-Related:
 
-- PHP: `session_destroy()`
-- JavaScript / Node.js: Express session store teardown or manual cookie-session invalidation
+:example
+String id = session_start("uce-doc-example-destroy");
+session_destroy("uce-doc-example-destroy");
+print(id != "" ? "destroyed\n" : "empty\n");