Bless pretty tests.

tests/pretty/issue-4264.pp

@@ -34,7 +34,7 @@ fn bar() ({
             ((::alloc::fmt::format as
                     for<'a> fn(Arguments<'a>) -> String {format})(((format_arguments::new_const
                         as
-                        fn(&[&'static str; 1]) -> Arguments<'_> {Arguments::<'_>::new_const::<1>})((&([("test"
+                        fn(&[&'static str; 1]) -> Arguments<'_> {core::fmt::rt::<impl Arguments<'_>>::new_const::<1>})((&([("test"
                                     as &str)] as [&str; 1]) as &[&str; 1])) as Arguments<'_>))
                 as String)
         } as String)) as String);