Format all tests.

tests/standalone/io/directory_chdir_test.dart

Index: tests/standalone/io/directory_chdir_test.dart
diff --git a/tests/standalone/io/directory_chdir_test.dart b/tests/standalone/io/directory_chdir_test.dart
index 3613aad7cd1cd079a41354c43c624ac5285e0887..d1ae9b822d99e3250401cfe1ba3f12557a2f19c3 100644
--- a/tests/standalone/io/directory_chdir_test.dart
+++ b/tests/standalone/io/directory_chdir_test.dart
@@ -4,7 +4,6 @@
 //
 // Directory listing test.
 
-
 import "dart:io";
 
 import "package:async_helper/async_helper.dart";
@@ -39,18 +38,16 @@ testChangeDirectory() {
   });
 }
 
-
 testChangeDirectoryIllegalArguments() {
   Expect.throws(() => Directory.current = 1, (e) => e is ArgumentError);
   Expect.throws(() => Directory.current = 111111111111111111111111111111111111,
-                (e) => e is ArgumentError);
+      (e) => e is ArgumentError);
   Expect.throws(() => Directory.current = true, (e) => e is ArgumentError);
   Expect.throws(() => Directory.current = [], (e) => e is ArgumentError);
-  Expect.throws(() => Directory.current = new File("xxx"),
-                (e) => e is ArgumentError);
+  Expect.throws(
+      () => Directory.current = new File("xxx"), (e) => e is ArgumentError);
 }
 
-
 main() {
   testChangeDirectory();
   testChangeDirectoryIllegalArguments();