Update ui test suite to nightly-2021-12-02
diff --git a/tests/ui/unique_ptr_as_mut.stderr b/tests/ui/unique_ptr_as_mut.stderr
index 1fe37b8..a8248db 100644
--- a/tests/ui/unique_ptr_as_mut.stderr
+++ b/tests/ui/unique_ptr_as_mut.stderr
@@ -1,4 +1,4 @@
-error[E0596]: cannot borrow data in a dereference of `UniquePtr<ffi::Opaque>` as mutable
+error[E0596]: cannot borrow data in dereference of `UniquePtr<ffi::Opaque>` as mutable
   --> tests/ui/unique_ptr_as_mut.rs:22:31
    |
 22 |     let _: &mut ffi::Opaque = &mut opaque;