Better group RFC ui tests together

tests/ui/rfcs/rfc-2632-const-trait-impl/impl-with-default-fn-pass.rs

@@ -0,0 +1,26 @@
+// check-pass
+
+#![feature(const_trait_impl)]
+
+#[const_trait]
+trait Tr {
+    fn req(&self);
+
+    fn default() {}
+}
+
+impl const Tr for u8 {
+    fn req(&self) {}
+}
+
+macro_rules! impl_tr {
+    ($ty: ty) => {
+        impl const Tr for $ty {
+            fn req(&self) {}
+        }
+    }
+}
+
+impl_tr!(u64);
+
+fn main() {}