dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/lookup_map/generic_type_test.dart

Index: tests/compiler/dart2js_extra/lookup_map/generic_type_test.dart
diff --git a/tests/compiler/dart2js_extra/lookup_map/generic_type_test.dart b/tests/compiler/dart2js_extra/lookup_map/generic_type_test.dart
index 1a2fd6e3e03d1e558e5afb30435cc1ba879bb452..eb46a0e422a53b2bafd74de245747b7af5ed2254 100644
--- a/tests/compiler/dart2js_extra/lookup_map/generic_type_test.dart
+++ b/tests/compiler/dart2js_extra/lookup_map/generic_type_test.dart
@@ -5,11 +5,13 @@
 import 'package:lookup_map/lookup_map.dart';
 import 'package:expect/expect.dart';
 
-class A{}
-class M<T>{ get type => T; }
-const map = const LookupMap(const [
-    A, 'the-text-for-A',
-]);
+class A {}
+
+class M<T> {
+  get type => T;
+}
+
+const map = const LookupMap(const [A, 'the-text-for-A',]);
 
 main() {
   Expect.equals(map[new M<A>().type], 'the-text-for-A');