chore: remove unnecessary brackets from examples (#552)

examples/calculator.rs

@@ -57,12 +57,12 @@ fn app(cx: Scope) -> Element {
     };
 
     cx.render(rsx!(
-        style { [include_str!("./assets/calculator.css")] }
+        style { include_str!("./assets/calculator.css") }
         div { id: "wrapper",
             div { class: "app",
                 div { class: "calculator",
                     onkeydown: handle_key_down_event,
-                    div { class: "calculator-display", [val.to_string()] }
+                    div { class: "calculator-display", val.to_string() }
                     div { class: "calculator-keypad",
                         div { class: "input-keys",
                             div { class: "function-keys",
@@ -74,7 +74,7 @@ fn app(cx: Scope) -> Element {
                                             val.set("0".into());
                                         }
                                     },
-                                    [if val.is_empty() { "C" } else { "AC" }]
+                                    if val.is_empty() { "C" } else { "AC" }
                                 }
                                 button {
                                     class: "calculator-key key-sign",