CoAlloc: Fixed previous sick result of: tidy --bless

Author: peter-lyons-kehl

library/alloc/src/vec/mod.rs

@@ -1875,12 +1875,11 @@ where
         }
 
         /* INVARIANT: vec.len() > read >= write > write-1 >= 0 */
+        #[allow(unused_braces)]
         struct FillGapOnDrop<'a, T, A: core::alloc::Allocator, const CO_ALLOC_PREF: CoAllocPref>
         where
             [(); { crate::meta_num_slots!(A, CO_ALLOC_PREF) }]:,
         {
-            crate::meta_num_slots!(A, CO_ALLOC_PREF) }]:,
-            {
             /* Offset of the element we want to check if it is duplicate */
             read: usize,
 
@@ -3333,7 +3332,6 @@ where
 
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_const_unstable(feature = "const_default_impls", issue = "87864")]
-#[allow(unused_braces)]
 impl<T> const Default for Vec<T> {
     /// Creates an empty `Vec<T>`.
     ///