Update unpretty tests.

Author: m-ou-se

tests/ui/unpretty/exhaustive.hir.stdout

@@ -405,8 +405,10 @@ mod expressions {
     fn expr_format_args() {
         let expr;
         format_arguments::new_const(&[]);
-        format_arguments::new_v1(&[""],
-            &[format_argument::new_display(&expr)]);
+        {
+            super let args = [format_argument::new_display(&expr)];
+            format_arguments::new_v1(&[""], &args)
+        };
     }
 }
 mod items {

tests/ui/unpretty/flattened-format-args.stdout

@@ -10,7 +10,9 @@ fn main() {
     let x = 1;
     // Should flatten to println!("a 123 b {x} xyz\n"):
     {
-        ::std::io::_print(format_arguments::new_v1(&["a 123 b ", " xyz\n"],
-                &[format_argument::new_display(&x)]));
+        ::std::io::_print({
+                super let args = [format_argument::new_display(&x)];
+                format_arguments::new_v1(&["a 123 b ", " xyz\n"], &args)
+            });
     };
 }