Format all tests.

tests/language_strong/library_prefixes_test.dart

Index: tests/language_strong/library_prefixes_test.dart
diff --git a/tests/language_strong/library_prefixes_test.dart b/tests/language_strong/library_prefixes_test.dart
index 80714da48415d677aae26c6b586f0b16271b10b5..a4f48f32abafe60e214bae7c03c7c35454993792 100644
--- a/tests/language_strong/library_prefixes_test.dart
+++ b/tests/language_strong/library_prefixes_test.dart
@@ -3,12 +3,15 @@
 // BSD-style license that can be found in the LICENSE file.
 
 library LibraryPrefixesTest.dart;
+
 import "package:expect/expect.dart";
 import "library_prefixes.lib";
 
 class LibraryPrefixesTest {
   static testMain() {
-    LibraryPrefixes.main((a, b) { Expect.equals(a, b); });
+    LibraryPrefixes.main((a, b) {
+      Expect.equals(a, b);
+    });
   }
 }