Chore: some cleanup and documentation

packages/web/examples/fragment.rs

@@ -14,14 +14,12 @@ fn main() {
 
 static App: FC<()> = |ctx| {
     ctx.render(rsx! {
-        h2 { "abc 1" }
-        h2 { "abc 1" }
-        h2 { "abc 1" }
-        h2 { "abc 1" }
-        h2 { "abc 1" }
         h2 { "abc 1" }
         div {
             "hello world!"
         }
+        Fragment {
+            h2 { "abc 2"}
+        }
     })
 };