Disambiguate expressions in rsx by requiring curlies

packages/web/tests/hydrate.rs

@@ -43,7 +43,7 @@ fn rehydrates() {
                     },
                     "listener test"
                 }
-                false.then(|| rsx!{ "hello" })
+                {false.then(|| rsx!{ "hello" })}
             }
         })
     }