dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/minus_zero_test.dart

 // Copyright (c) 2014, 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.
 
 // Regression test for issue 17210.
 
 import "package:expect/expect.dart";
 
-const double MINUS_ZERO = -0; /// 01: static type warning, checked mode compile-time error
+const double MINUS_ZERO = -0;
+
+/// 01: static type warning, checked mode compile-time error

[Siggi Cherem (dart-lang), 2016/09/16 20:55:22]

revert

[Harry Terkelsen, 2016/09/16 21:44:03]

Done.

 
 void main() {
   // Dart2js must not infer that the type-intersection of int and -0.0 is empty.
   // It must get an interceptor for the addition (`i += 3`), or use the native
   // JS + operation.
-  int i = MINUS_ZERO;  /// 01: continued
-  i += 3;              /// 01: continued
-  Expect.equals(3, i); /// 01: continued
+  int i = MINUS_ZERO;
+
+  /// 01: continued
+  i += 3;
+
+  /// 01: continued
+  Expect.equals(3, i);
+
+  /// 01: continued
 }