dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/int_index_test.dart

 // Copyright (c) 2012, 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.
 
 main() {
   var a = [0, 1];
-  a[1.2];     /// 01: runtime error
-  a[1.2] = 4; /// 02: runtime error
-  checkIndex(a, 1.4); /// 03: runtime error
-  checkIndexedAssignment(a, 1.4); /// 04: runtime error
+  a[1.2];
+
+  /// 01: runtime error

[Siggi Cherem (dart-lang), 2016/09/16 20:55:24]

revert

[Harry Terkelsen, 2016/09/16 21:44:04]

Done.

+  a[1.2] = 4;
+
+  /// 02: runtime error
+  checkIndex(a, 1.4);
+
+  /// 03: runtime error
+  checkIndexedAssignment(a, 1.4);
+
+  /// 04: runtime error
   checkIndex(a, 0);
   checkIndexedAssignment(a, 0);
 }
 
 checkIndex(a, b) {
   a[b];
 }
 
 checkIndexedAssignment(a, b) {
   a[b] = 1;
 }