dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/is_check_instanceof_test.dart

Index: tests/compiler/dart2js_extra/is_check_instanceof_test.dart
diff --git a/tests/compiler/dart2js_extra/is_check_instanceof_test.dart b/tests/compiler/dart2js_extra/is_check_instanceof_test.dart
index 024d538f21eb679ade324a1c606674d966041bb3..7e9c8a4a85f59e3881473ef99d00a869c3a56e25 100644
--- a/tests/compiler/dart2js_extra/is_check_instanceof_test.dart
+++ b/tests/compiler/dart2js_extra/is_check_instanceof_test.dart
@@ -10,13 +10,19 @@ import "package:expect/expect.dart";
 // This test verifies is-checks work with simple classes that have various
 // degrees of instantiation.
 
-class INSTANTIATED {}             // instantiated and used in many ways
-class DEFERRED {}                 // instantiated after first check
-class UNUSED {}                   // used only in is-check
-class REMOVED {}                  // allocated but optimized out of program
-class DEFERRED_AND_REMOVED {}     // allocated after first check and removed
-class USED_AS_TYPE_PARAMETER {}   // only used as a type parameter
-class USED_AS_TESTED_TYPE_PARAMETER {}   // only used as a type parameter
+class INSTANTIATED {} // instantiated and used in many ways
+
+class DEFERRED {} // instantiated after first check
+
+class UNUSED {} // used only in is-check
+
+class REMOVED {} // allocated but optimized out of program
+
+class DEFERRED_AND_REMOVED {} // allocated after first check and removed
+
+class USED_AS_TYPE_PARAMETER {} // only used as a type parameter
+
+class USED_AS_TESTED_TYPE_PARAMETER {} // only used as a type parameter
 
 class Check<T> {
   bool check(x) => x is T;
@@ -34,7 +40,7 @@ void main() {
   var checkU1 = new Check<USED_AS_TESTED_TYPE_PARAMETER>();
   var checkU2 = new Check<USED_AS_TYPE_PARAMETER>();
 
-  var removed = new REMOVED();  // This is optimized out.
+  var removed = new REMOVED(); // This is optimized out.
 
   // Tests that can be compiled to instanceof:
   Expect.isTrue(things[0] is INSTANTIATED);
@@ -51,7 +57,7 @@ void main() {
   Expect.isFalse(checkU1.check(things[1]));
   Expect.isFalse(checkU2.check(things[1]));
 
-  var removed2 = new DEFERRED_AND_REMOVED();  // This is optimized out.
+  var removed2 = new DEFERRED_AND_REMOVED(); // This is optimized out.
 
   // First allocation of DEFERRED is after the above tests.
   things.setRange(0, 3, [new INSTANTIATED(), 1, new DEFERRED()]);