Format all tests.

tests/language/isnot_malformed_type_test.dart

Index: tests/language/isnot_malformed_type_test.dart
diff --git a/tests/language/isnot_malformed_type_test.dart b/tests/language/isnot_malformed_type_test.dart
index 867e9f7b9d1dae62c83692656b3d96422af62511..147ffe64f8e90f306b80ea23404b879ef3cf27f1 100644
--- a/tests/language/isnot_malformed_type_test.dart
+++ b/tests/language/isnot_malformed_type_test.dart
@@ -6,9 +6,9 @@ import 'package:expect/expect.dart';
 
 f(obj) {
   // 'Baz' is not loaded, throws a type error on test.
-  return (obj is !Baz);
+  return (obj is! Baz);
 }
 
-main () {
+main() {
   Expect.throws(() => f(null), (e) => e is TypeError);
 }