Revert "Format all multitests"

tests/language/mixin_illegal_cycles_test.dart

Index: tests/language/mixin_illegal_cycles_test.dart
diff --git a/tests/language/mixin_illegal_cycles_test.dart b/tests/language/mixin_illegal_cycles_test.dart
index 06c907fb2b4e6c7e3a75a29d6aa79ec4576a6e17..084aab2504910927098988cd68e41593465ae4d9 100644
--- a/tests/language/mixin_illegal_cycles_test.dart
+++ b/tests/language/mixin_illegal_cycles_test.dart
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-class M {}
+class M { }
 class M0 extends Object with M0 { } // //# 01: compile-time error
 class M1 = Object with M1; //        //# 02: compile-time error