format derives

Co-authored-by: lzutao <taolzu@gmail.com>

src/librustc_middle/ty/sty.rs

@@ -208,19 +208,8 @@ pub enum TyKind<'tcx> {
 
 /// A type that is not publicly constructable. This prevents people from making `TyKind::Error`
 /// except through `tcx.err*()`.
-#[derive(
-    Copy,
-    Clone,
-    Debug,
-    Eq,
-    Hash,
-    PartialEq,
-    PartialOrd,
-    Ord,
-    RustcEncodable,
-    RustcDecodable,
-    HashStable
-)]
+#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
+#[derive(RustcEncodable, RustcDecodable, HashStable)]
 pub struct DelaySpanBugEmitted(pub(super) ());
 
 // `TyKind` is used a lot. Make sure it doesn't unintentionally get bigger.