dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/lookup_map/escaping_entries_test.dart

Index: tests/compiler/dart2js_extra/lookup_map/escaping_entries_test.dart
diff --git a/tests/compiler/dart2js_extra/lookup_map/escaping_entries_test.dart b/tests/compiler/dart2js_extra/lookup_map/escaping_entries_test.dart
index 30fa3d30562ebf64046133007c9ca7e12aa7dbc4..704f44845a84d041deae5a6fb454504f697a996a 100644
--- a/tests/compiler/dart2js_extra/lookup_map/escaping_entries_test.dart
+++ b/tests/compiler/dart2js_extra/lookup_map/escaping_entries_test.dart
@@ -4,11 +4,16 @@
 
 import 'package:lookup_map/lookup_map.dart';
 import 'package:expect/expect.dart';
-class A{}
-class B{}
+
+class A {}
+
+class B {}
+
 const entries = const [
-  A, "the-text-for-A",
-  B, "the-text-for-B",
+  A,
+  "the-text-for-A",
+  B,
+  "the-text-for-B",
 ];
 const map = const LookupMap(entries);
 main() {