Fix cargo fmt formatting in subscribe_form handlers tests

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

crates/web/src/app/subscribe_form/handlers.rs

@@ -34,7 +34,13 @@ mod tests {
 
     #[test]
     fn message_reports_the_article_count() {
-        assert_eq!(subscribed_message(0), "Subscribed — pulled in 0 article(s).");
-        assert_eq!(subscribed_message(3), "Subscribed — pulled in 3 article(s).");
+        assert_eq!(
+            subscribed_message(0),
+            "Subscribed — pulled in 0 article(s)."
+        );
+        assert_eq!(
+            subscribed_message(3),
+            "Subscribed — pulled in 3 article(s)."
+        );
     }
 }