Run formatter on a few frontend and kernel files that hadn't been formatted.

pkg/front_end/testcases/rasta/type_literals.dart

 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 typedef void Func();
 
 class C<T> {
   test() {
     // Note: we cannot write a type literal with generic type arguments. For
     // example, `C<String>` isn't a valid expression.
@@ skipping 71 matching lines @@
 
     C += 42;
     use(C += 42);
     dynamic += 42;
     use(dynamic += 42);
     T += 42;
     use(T += 42);
     Func += 42;
     use(Func += 42);
 
-    C-= 42;
-    use(C-= 42);
-    dynamic-= 42;
-    use(dynamic-= 42);
-    T-= 42;
-    use(T-= 42);
-    Func-= 42;
-    use(Func-= 42);
+    C -= 42;
+    use(C -= 42);
+    dynamic -= 42;
+    use(dynamic -= 42);
+    T -= 42;
+    use(T -= 42);
+    Func -= 42;
+    use(Func -= 42);
   }
 }
 
 use(x) {
   if (x == new DateTime.now().millisecondsSinceEpoch) throw "Shouldn't happen";
 }
 
 main() {
   new C().test();
 }