dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/equals_test.dart

 // Copyright (c) 2011, 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.
 
 void main() {
   var x = 3;
   if (x == x) {
     print('good');
   } else {
     throw "x != x with x == 3";
   }
   var y = x;
-  if (true) { y = 10; }
+  if (true) {
+    y = 10;
+  }
   if (x == y) throw "3 == 10";
   if (y == true) throw "10 == true";
   if (y == "str") throw "3 == 'str'";
   if (true == 'str') throw "true == 'str'";
   if (true) y = false;
   if (y == false) {
     print('good');
   } else {
     throw "false != false";
   }
 }