CoAlloc: std: minor tidy

Author: peter-lyons-kehl

library/std/src/io/impls.rs

@@ -1,7 +1,7 @@
 #[cfg(test)]
 mod tests;
 
-use crate::alloc::{Allocator, self};
+use crate::alloc::{self, Allocator};
 use crate::cmp;
 use crate::collections::VecDeque;
 use crate::fmt;

library/std/src/sys/hermit/thread_local_dtor.rs

@@ -6,8 +6,8 @@
 // The this solution works like the implementation of macOS and
 // doesn't additional OS support
 
-use core::alloc::PlVec;
 use crate::mem;
+use core::alloc::PlVec;
 
 #[thread_local]
 static mut DTORS: PlVec<(*mut u8, unsafe extern "C" fn(*mut u8))> = PlVec::new();

library/std/src/sys/solid/thread_local_dtor.rs

@@ -1,5 +1,6 @@
 #![cfg(target_thread_local)]
-#![unstable(feature = "thread_local_internals", issue = "none")]#![feature(global_co_alloc_plvec)]
+#![unstable(feature = "thread_local_internals", issue = "none")]
+#![feature(global_co_alloc_plvec)]
 #![feature(global_co_alloc_plvec)]
 
 // Simplify dtor registration by using a list of destructors.