Reformat use declarations.

The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.

Author: nnethercote

alloc/benches/btree/map.rs

@@ -1,7 +1,8 @@
 use std::collections::BTreeMap;
 use std::ops::RangeBounds;
 
-use rand::{seq::SliceRandom, Rng};
+use rand::seq::SliceRandom;
+use rand::Rng;
 use test::{black_box, Bencher};
 
 macro_rules! map_insert_rand_bench {

alloc/benches/linked_list.rs

@@ -1,4 +1,5 @@
 use std::collections::LinkedList;
+
 use test::Bencher;
 
 #[bench]

alloc/benches/string.rs

@@ -1,4 +1,5 @@
 use std::iter::repeat;
+
 use test::{black_box, Bencher};
 
 #[bench]

alloc/benches/vec.rs

@@ -1,5 +1,6 @@
-use rand::RngCore;
 use std::iter::repeat;
+
+use rand::RngCore;
 use test::{black_box, Bencher};
 
 #[bench]

alloc/benches/vec_deque.rs

@@ -1,7 +1,6 @@
-use std::{
-    collections::{vec_deque, VecDeque},
-    mem,
-};
+use std::collections::{vec_deque, VecDeque};
+use std::mem;
+
 use test::{black_box, Bencher};
 
 #[bench]

alloc/benches/vec_deque_append.rs

@@ -1,4 +1,5 @@
-use std::{collections::VecDeque, time::Instant};
+use std::collections::VecDeque;
+use std::time::Instant;
 
 const VECDEQUE_LEN: i32 = 100000;
 const WARMUP_N: usize = 100;

alloc/src/alloc.rs

@@ -2,16 +2,14 @@
 
 #![stable(feature = "alloc_module", since = "1.28.0")]
 
+#[stable(feature = "alloc_module", since = "1.28.0")]
+#[doc(inline)]
+pub use core::alloc::*;
 #[cfg(not(test))]
 use core::hint;
-
 #[cfg(not(test))]
 use core::ptr::{self, NonNull};
 
-#[stable(feature = "alloc_module", since = "1.28.0")]
-#[doc(inline)]
-pub use core::alloc::*;
-
 #[cfg(test)]
 mod tests;
 

alloc/src/alloc/tests.rs

@@ -1,9 +1,10 @@
 use super::*;
 
 extern crate test;
-use crate::boxed::Box;
 use test::Bencher;
 
+use crate::boxed::Box;
+
 #[test]
 fn allocate_zeroed() {
     unsafe {

alloc/src/borrow.rs

@@ -2,21 +2,20 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use core::borrow::{Borrow, BorrowMut};
 use core::cmp::Ordering;
 use core::hash::{Hash, Hasher};
 #[cfg(not(no_global_oom_handling))]
 use core::ops::{Add, AddAssign};
 use core::ops::{Deref, DerefPure};
 
-#[stable(feature = "rust1", since = "1.0.0")]
-pub use core::borrow::{Borrow, BorrowMut};
+use Cow::*;
 
 use crate::fmt;
 #[cfg(not(no_global_oom_handling))]
 use crate::string::String;
 
-use Cow::*;
-
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, B: ?Sized> Borrow<B> for Cow<'a, B>
 where

alloc/src/boxed.rs

@@ -187,26 +187,26 @@
 
 use core::any::Any;
 use core::async_iter::AsyncIterator;
-use core::borrow;
 #[cfg(not(no_global_oom_handling))]
 use core::clone::CloneToUninit;
 use core::cmp::Ordering;
 use core::error::Error;
-use core::fmt;
 use core::future::Future;
 use core::hash::{Hash, Hasher};
 use core::iter::FusedIterator;
-use core::marker::Tuple;
-use core::marker::Unsize;
+use core::marker::{Tuple, Unsize};
 use core::mem::{self, SizedTypeProperties};
-use core::ops::{AsyncFn, AsyncFnMut, AsyncFnOnce};
 use core::ops::{
-    CoerceUnsized, Coroutine, CoroutineState, Deref, DerefMut, DerefPure, DispatchFromDyn, Receiver,
+    AsyncFn, AsyncFnMut, AsyncFnOnce, CoerceUnsized, Coroutine, CoroutineState, Deref, DerefMut,
+    DerefPure, DispatchFromDyn, Receiver,
 };
 use core::pin::Pin;
 use core::ptr::{self, addr_of_mut, NonNull, Unique};
-use core::slice;
 use core::task::{Context, Poll};
+use core::{borrow, fmt, slice};
+
+#[unstable(feature = "thin_box", issue = "92791")]
+pub use thin::ThinBox;
 
 #[cfg(not(no_global_oom_handling))]
 use crate::alloc::handle_alloc_error;
@@ -222,9 +222,6 @@ use crate::vec;
 #[cfg(not(no_global_oom_handling))]
 use crate::vec::Vec;
 
-#[unstable(feature = "thin_box", issue = "92791")]
-pub use thin::ThinBox;
-
 mod thin;
 
 /// A pointer type that uniquely owns a heap allocation of type `T`.