Update tests.

tests/pretty/issue-4264.pp

@@ -34,10 +34,11 @@ fn bar() ({
                     ((::alloc::fmt::format as
                             for<'a> fn(Arguments<'a>) -> String {format})(((<#[lang = "format_arguments"]>::new_v1
                                 as
-                                fn(&[&'static str], &[ArgumentV1<'_>]) -> Arguments<'_> {Arguments::<'_>::new_v1})((&([("test"
+                                fn(&[&'static str], &[core::fmt::ArgumentV1<'_>]) -> Arguments<'_> {Arguments::<'_>::new_v1})((&([("test"
                                             as &str)] as [&str; 1]) as &[&str; 1]),
-                            (&([] as [ArgumentV1<'_>; 0]) as &[ArgumentV1<'_>; 0])) as
-                            Arguments<'_>)) as String);
+                            (&([] as [core::fmt::ArgumentV1<'_>; 0]) as
+                                &[core::fmt::ArgumentV1<'_>; 0])) as Arguments<'_>)) as
+                        String);
                 (res as String)
             } as String);
     } as ())

tests/ui/fmt/ifmt-unimpl.stderr

@@ -15,7 +15,7 @@ LL |     format!("{:X}", "3");
              NonZeroIsize
            and 21 others
    = note: required for `&str` to implement `UpperHex`
-note: required by a bound in `ArgumentV1::<'a>::new_upper_hex`
+note: required by a bound in `core::fmt::ArgumentV1::<'a>::new_upper_hex`
   --> $SRC_DIR/core/src/fmt/mod.rs:LL:COL
    = note: this error originates in the macro `$crate::__export::format_args` which comes from the expansion of the macro `arg_new` (in Nightly builds, run with -Z macro-backtrace for more info)
 

tests/ui/fmt/send-sync.stderr

@@ -6,11 +6,11 @@ LL |     send(format_args!("{:?}", c));
    |     |
    |     required by a bound introduced by this call
    |
-   = help: within `[ArgumentV1<'_>]`, the trait `Sync` is not implemented for `core::fmt::Opaque`
+   = help: within `[core::fmt::ArgumentV1<'_>]`, the trait `Sync` is not implemented for `core::fmt::Opaque`
    = note: required because it appears within the type `&core::fmt::Opaque`
    = note: required because it appears within the type `ArgumentV1<'_>`
    = note: required because it appears within the type `[ArgumentV1<'_>]`
-   = note: required for `&[ArgumentV1<'_>]` to implement `Send`
+   = note: required for `&[core::fmt::ArgumentV1<'_>]` to implement `Send`
    = note: required because it appears within the type `Arguments<'_>`
 note: required by a bound in `send`
   --> $DIR/send-sync.rs:1:12