Auto merge of #67540 - Mark-Simulacrum:fmt-the-world, r=Centril

Format the world

This PR modifies the formatting infrastructure a bit in the first commit (to enable the forgotten 2018 edition), as well as removes most directories from the ignore list in rustfmt.toml. It then follows that up with the second commit which runs `x.py fmt` and formats the entire repository.

We continue to not format the test directory (`src/test`) because of interactions with pretty printing and, in part, because re-blessing all of those files is somewhat harder to review, so is best suited for a follow up PR in my opinion.

1 files changed, 8 insertions, 15 deletions

diff --git a/src/liballoc/alloc.rs b/src/liballoc/alloc.rs
index 9bc76f51570..0c0dc928b95 100644
--- a/src/liballoc/alloc.rs
+++ b/src/liballoc/alloc.rs
@@ -24,10 +24,7 @@ extern "Rust" {
     #[rustc_allocator_nounwind]
     fn __rust_dealloc(ptr: *mut u8, size: usize, align: usize);
     #[rustc_allocator_nounwind]
-    fn __rust_realloc(ptr: *mut u8,
-                      old_size: usize,
-                      align: usize,
-                      new_size: usize) -> *mut u8;
+    fn __rust_realloc(ptr: *mut u8, old_size: usize, align: usize, new_size: usize) -> *mut u8;
     #[rustc_allocator_nounwind]
     fn __rust_alloc_zeroed(size: usize, align: usize) -> *mut u8;
 }
@@ -178,12 +175,12 @@ unsafe impl Alloc for Global {
     }
 
     #[inline]
-    unsafe fn realloc(&mut self,
-                      ptr: NonNull<u8>,
-                      layout: Layout,
-                      new_size: usize)
-                      -> Result<NonNull<u8>, AllocErr>
-    {
+    unsafe fn realloc(
+        &mut self,
+        ptr: NonNull<u8>,
+        layout: Layout,
+        new_size: usize,
+    ) -> Result<NonNull<u8>, AllocErr> {
         NonNull::new(realloc(ptr.as_ptr(), layout, new_size)).ok_or(AllocErr)
     }
 
@@ -204,11 +201,7 @@ unsafe fn exchange_malloc(size: usize, align: usize) -> *mut u8 {
     } else {
         let layout = Layout::from_size_align_unchecked(size, align);
         let ptr = alloc(layout);
-        if !ptr.is_null() {
-            ptr
-        } else {
-            handle_alloc_error(layout)
-        }
+        if !ptr.is_null() { ptr } else { handle_alloc_error(layout) }
     }
 }