dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/lookup_map/live_entry_test.dart

Index: tests/compiler/dart2js_extra/lookup_map/live_entry_test.dart
diff --git a/tests/compiler/dart2js_extra/lookup_map/live_entry_test.dart b/tests/compiler/dart2js_extra/lookup_map/live_entry_test.dart
index aa835a8562b7c1021ee14ee7b06080daf2436829..a1481479be4d4379bb5004f9aa48c1c123e39ebe 100644
--- a/tests/compiler/dart2js_extra/lookup_map/live_entry_test.dart
+++ b/tests/compiler/dart2js_extra/lookup_map/live_entry_test.dart
@@ -4,9 +4,12 @@
 
 import 'package:lookup_map/lookup_map.dart';
 import 'package:expect/expect.dart';
-class A{}
+
+class A {}
+
 const map = const LookupMap(const [
-    A, "the-text-for-A",
+  A,
+  "the-text-for-A",
 ]);
 main() {
   Expect.equals(map[A], 'the-text-for-A');