Format all tests.

tests/language_strong/named_parameters4_test.dart

Index: tests/language_strong/named_parameters4_test.dart
diff --git a/tests/language_strong/named_parameters4_test.dart b/tests/language_strong/named_parameters4_test.dart
index 25473648503a2c39a5ed67f7dba3feb792a89e6a..3602cd29867064cb7f4f05c196ba9cd399a6be7e 100644
--- a/tests/language_strong/named_parameters4_test.dart
+++ b/tests/language_strong/named_parameters4_test.dart
@@ -18,7 +18,7 @@ int test(int a) {
 main() {
   bool foundError = false;
   try {
-    test(10, x:99);  // 1 positional arg, as expected. Param x does not exist.
+    test(10, x: 99); // 1 positional arg, as expected. Param x does not exist.
   } on NoSuchMethodError catch (e) {
     foundError = true;
   }