change macro a bit

src/widget/trait_fns.rs

@@ -4,8 +4,8 @@ use iris_macro::widget_trait;
 // these methods should "not require any context" (require unit) because they're in core
 event_ctx!(());
 
-widget_trait!(
-    pub CoreWidget;
+widget_trait! {
+    pub trait CoreWidget;
 
     fn pad(self, padding: impl Into<Padding>) -> impl WidgetFn<Pad> {
         |ui| Pad {
@@ -130,7 +130,7 @@ widget_trait!(
     fn set_ptr(self, ptr: &WidgetRef<WidgetPtr>, ui: &mut Ui) {
         ptr.get_mut().inner = Some(self.add(ui));
     }
-);
+}
 
 pub trait CoreWidgetArr<const LEN: usize, Wa: WidgetArrLike<LEN, Tag>, Tag> {
     fn span(self, dir: Dir) -> SpanBuilder<LEN, Wa, Tag>;