dart2js: run dartfmt on tests

tests/compiler/dart2js_native/native_exception_test.dart

Index: tests/compiler/dart2js_native/native_exception_test.dart
diff --git a/tests/compiler/dart2js_native/native_exception_test.dart b/tests/compiler/dart2js_native/native_exception_test.dart
index e3d2231654a1d26c49264655d52a430bfa9c880d..a4641bb3fab0a5c92119b77ea19d06cf920e4e67 100644
--- a/tests/compiler/dart2js_native/native_exception_test.dart
+++ b/tests/compiler/dart2js_native/native_exception_test.dart
@@ -20,15 +20,25 @@ main() {
     previous = e;
     return '$e' != '[object Object]';
   }
-  Expect.throws(() { JS('void', 'noGlobalVariableWithThisName'); }, check);
-  Expect.throws(() { JS('void', 'throw 3'); }, check);
-  Expect.throws(
-      () {
-        JS('bool', 'Object.prototype.hasOwnProperty.call(undefined, "foo")');
-      },
-      check);
-  Expect.throws(() { JS('void', 'throw new ReferenceError()'); }, check);
-  Expect.throws(() { JS('void', 'throw void 0'); }, check);
-  Expect.throws(() { JS('void', 'throw "a string"'); }, check);
-  Expect.throws(() { JS('void', 'throw null'); }, check);
+  Expect.throws(() {
+    JS('void', 'noGlobalVariableWithThisName');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw 3');
+  }, check);
+  Expect.throws(() {
+    JS('bool', 'Object.prototype.hasOwnProperty.call(undefined, "foo")');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw new ReferenceError()');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw void 0');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw "a string"');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw null');
+  }, check);
 }