dart2js: run dartfmt on tests

tests/compiler/dart2js/number_output_test.dart

Index: tests/compiler/dart2js/number_output_test.dart
diff --git a/tests/compiler/dart2js/number_output_test.dart b/tests/compiler/dart2js/number_output_test.dart
index 6f873a56e4ab1bde6e3fb762b1eccff30e2f8dee..af53a597e8f6cfa114df98e9025c194d6527b974 100644
--- a/tests/compiler/dart2js/number_output_test.dart
+++ b/tests/compiler/dart2js/number_output_test.dart
@@ -8,13 +8,14 @@ import 'package:async_helper/async_helper.dart';
 import 'memory_compiler.dart';
 
 const MEMORY_SOURCE_FILES = const {
-    'main.dart': '''
+  'main.dart': '''
         main() {
           print(12300000);
           print(1234567890123456789012345);
           print(double.MAX_FINITE);
           print(-22230000);
-        }'''};
+        }'''
+};
 
 Future test({bool minify}) async {
   OutputCollector collector = new OutputCollector();