dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/lookup_map/dead_entry_test.dart

Index: tests/compiler/dart2js_extra/lookup_map/dead_entry_test.dart
diff --git a/tests/compiler/dart2js_extra/lookup_map/dead_entry_test.dart b/tests/compiler/dart2js_extra/lookup_map/dead_entry_test.dart
index c5fb956f9f50cd5b82b8725122f6020cf9c7f36f..b4579fd796bdb9dc4800ee5dc9775f5d81a6af9f 100644
--- a/tests/compiler/dart2js_extra/lookup_map/dead_entry_test.dart
+++ b/tests/compiler/dart2js_extra/lookup_map/dead_entry_test.dart
@@ -4,12 +4,12 @@
 
 import 'package:lookup_map/lookup_map.dart';
 import 'package:expect/expect.dart';
-class A{}
-class B{}
-const map = const LookupMap(const [
-    A, "the-text-for-A",
-    B, "the-text-for-B",
-]);
+
+class A {}
+
+class B {}
+
+const map = const LookupMap(const [A, "the-text-for-A", B, "the-text-for-B",]);
 
 main() {
   Expect.equals(map[A], "the-text-for-A");