Format all tests.

tests/language/checked_mode_helper.dart

 // Copyright (c) 2013, 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 file.
 
 library checked_mode_helper;
 
 import 'package:expect/expect.dart';
 
 /// Returns `true` if the program is running in checked mode.
 bool inCheckedMode() {
@@ skipping 15 matching lines @@
     checkNoDynamicTypeError(f, message);
   }
 }
 
 /// Checks that a dynamic type error is thrown if and only if [f] is executed in
 /// checked mode.
 void checkDynamicTypeError(f(), [String message]) {
   message = message != null ? ': $message' : '';
   try {
     f();
-    Expect.isFalse(inCheckedMode(),
-      'Missing type error in checked mode$message.');
+    Expect.isFalse(
+        inCheckedMode(), 'Missing type error in checked mode$message.');
   } on TypeError catch (e) {
-    Expect.isTrue(inCheckedMode(),
-      'Unexpected type error in production mode.');
+    Expect.isTrue(inCheckedMode(), 'Unexpected type error in production mode.');
   }
 }
 
 /// Checks that no dynamic type error is thrown when [f] is executed regardless
 /// of execution mode.
 void checkNoDynamicTypeError(f(), [String message]) {
   message = message != null ? ': $message' : '';
   try {
     f();
   } on TypeError catch (e) {
     String mode = inCheckedMode() ? 'checked mode' : 'production mode';
     Expect.fail('Unexpected type error in $mode$message.');
   }
 }