Fix imports

Author: Fedor Ryabinin

library/alloctests/tests/sort/known_good_stable_sort.rs

@@ -6,15 +6,16 @@
 
 #![feature(ub_checks)]
 use alloc::alloc::{Layout, alloc, dealloc};
-use safety::requires;
-use std::ptr;
 
 #[cfg(kani)]
 #[unstable(feature = "kani", issue = "none")]
 use core::kani;
 #[allow(unused_imports)]
 #[unstable(feature = "ub_checks", issue = "none")]
 use core::ub_checks::*;
+use std::ptr;
+
+use safety::requires;
 
 /// Sort `v` preserving initial order of equal elements.
 ///

library/core/src/fmt/rt.rs

@@ -249,7 +249,7 @@ impl<'a> Invariant for ArgumentType<'a> {
     fn is_safe(&self) -> bool {
         match self {
             ArgumentType::Placeholder { value, formatter, .. } => true,
-            ArgumentType::Count(_) => true
+            ArgumentType::Count(_) => true,
         }
     }
 }

library/core/src/iter/adapters/map_windows.rs

@@ -1,7 +1,7 @@
 use crate::iter::FusedIterator;
 use crate::mem::MaybeUninit;
-use crate::{fmt, ptr};
 use crate::ub_checks::Invariant;
+use crate::{fmt, ptr};
 
 /// An iterator over the mapped windows of another iterator.
 ///