dart2js: run dartfmt on tests

tests/compiler/dart2js/erroneous_element_test.dart

Index: tests/compiler/dart2js/erroneous_element_test.dart
diff --git a/tests/compiler/dart2js/erroneous_element_test.dart b/tests/compiler/dart2js/erroneous_element_test.dart
index 737f72178a1ae1ff69766cacf93af521060f2eb8..0fee336aa3b1fbc9328f0dc3e4b89a0f41c04ad0 100644
--- a/tests/compiler/dart2js/erroneous_element_test.dart
+++ b/tests/compiler/dart2js/erroneous_element_test.dart
@@ -4,15 +4,12 @@
 
 import 'package:expect/expect.dart';
 
-import 'package:compiler/src/diagnostics/messages.dart'
-    show MessageKind;
+import 'package:compiler/src/diagnostics/messages.dart' show MessageKind;
 import 'package:compiler/src/elements/elements.dart';
-import 'package:compiler/src/elements/modelx.dart'
-    show ErroneousElementX;
+import 'package:compiler/src/elements/modelx.dart' show ErroneousElementX;
 
 void main() {
-  ErroneousElement e = new ErroneousElementX(MessageKind.GENERIC,
-                                             {'text': 'error'},
-                                             'foo', null);
+  ErroneousElement e = new ErroneousElementX(
+      MessageKind.GENERIC, {'text': 'error'}, 'foo', null);
   Expect.stringEquals('<foo: error>', '$e');
 }