Auto merge of #125443 - nnethercote:rustfmt-use-decls, r=lcnr,cuviper,GuillaumeGomez

rustfmt `use` declarations

This PR implements https://github.com/rust-lang/compiler-team/issues/750, which changes how `use` declarations are formatted by adding these options to `rustfmt.toml`:
```
group_imports = "StdExternalCrate"
imports_granularity = "Module"
```

r? `@ghost`

1 files changed, 1 insertions, 3 deletions

diff --git a/library/alloc/src/sync.rs b/library/alloc/src/sync.rs
index f73cd0396cd..3ad0dae77db 100644
--- a/library/alloc/src/sync.rs
+++ b/library/alloc/src/sync.rs
@@ -9,13 +9,10 @@
 //! `#[cfg(target_has_atomic = "ptr")]`.
 
 use core::any::Any;
-use core::borrow;
 #[cfg(not(no_global_oom_handling))]
 use core::clone::CloneToUninit;
 use core::cmp::Ordering;
-use core::fmt;
 use core::hash::{Hash, Hasher};
-use core::hint;
 use core::intrinsics::abort;
 #[cfg(not(no_global_oom_handling))]
 use core::iter;
@@ -29,6 +26,7 @@ use core::ptr::{self, NonNull};
 use core::slice::from_raw_parts_mut;
 use core::sync::atomic;
 use core::sync::atomic::Ordering::{Acquire, Relaxed, Release};
+use core::{borrow, fmt, hint};
 
 #[cfg(not(no_global_oom_handling))]
 use crate::alloc::handle_alloc_error;