dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/inferrer_is_int_test.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.
 
 // Test that dart2js's inferrer and code optimizers know a double
 // literal might become an int at runtime.
 
 import "package:expect/expect.dart";
 import '../../language/compiler_annotations.dart';
 
 @DontInline()
 callWithStringAndDouble(value) {
   () => 42;
-  if (value is !int) throw new ArgumentError(value);
+  if (value is! int) throw new ArgumentError(value);
   return 42;
 }
 
 @DontInline()
 callWithDouble(value) {
   () => 42;
-  if (value is !int) throw new ArgumentError(value);
+  if (value is! int) throw new ArgumentError(value);
   return 42;
 }
 
 main() {
-  Expect.throws(() => callWithStringAndDouble('foo'),
-                (e) => e is ArgumentError);
+  Expect.throws(
+      () => callWithStringAndDouble('foo'), (e) => e is ArgumentError);
   Expect.equals(42, callWithStringAndDouble(0.0));
   Expect.equals(42, callWithDouble(0.0));
 }