Format all tests.

tests/standalone/io/directory_fuzz_test.dart

Index: tests/standalone/io/directory_fuzz_test.dart
diff --git a/tests/standalone/io/directory_fuzz_test.dart b/tests/standalone/io/directory_fuzz_test.dart
index 6e9705753ae8843bbdb5ea4de1253466916d9b50..c0ce827ffc84918bca1c83e007facba682298340 100644
--- a/tests/standalone/io/directory_fuzz_test.dart
+++ b/tests/standalone/io/directory_fuzz_test.dart
@@ -48,8 +48,7 @@ fuzzAsyncMethods() {
       Directory.systemTemp.createTempSync(v).deleteSync();
     }));
     if (v is! String) {
-      Expect.throws(() => new Directory(v),
-                    (e) => e is ArgumentError);
+      Expect.throws(() => new Directory(v), (e) => e is ArgumentError);
       return;
     }
     var d = new Directory(v);