Format all tests.

tests/language_strong/factory_negative_test.dart

Index: tests/language_strong/factory_negative_test.dart
diff --git a/tests/language_strong/factory_negative_test.dart b/tests/language_strong/factory_negative_test.dart
index 291b44936173caa804edffd79e30a1de62e29a54..20b4b98046f50f83b239a4ebd816ea5983bb2c34 100644
--- a/tests/language_strong/factory_negative_test.dart
+++ b/tests/language_strong/factory_negative_test.dart
@@ -8,7 +8,8 @@ abstract class Link<T> {
   factory Link.create() = LinkFactory<T>.create;
 }
 
-class LinkFactory { //   Compile time error: should be LinkFactory<T> to match abstract class above
+class LinkFactory {
+  //   Compile time error: should be LinkFactory<T> to match abstract class above
   factory Link.create() {
     return null;
   }