Format all tests.

tests/corelib/string_operations_with_null_test.dart

Index: tests/corelib/string_operations_with_null_test.dart
diff --git a/tests/corelib/string_operations_with_null_test.dart b/tests/corelib/string_operations_with_null_test.dart
index cac0c7ced0f32cd8422d65f7c523ffdb51201d8f..a05b98592e3afbd87be49b3d4c67b7f3caa15a39 100644
--- a/tests/corelib/string_operations_with_null_test.dart
+++ b/tests/corelib/string_operations_with_null_test.dart
@@ -11,8 +11,7 @@ returnStringOrNull() {
 }
 
 main() {
-  Expect.throws(() => 'foo' + returnStringOrNull(),
-                (e) => e is ArgumentError);
+  Expect.throws(() => 'foo' + returnStringOrNull(), (e) => e is ArgumentError);
   Expect.throws(() => 'foo'.split(returnStringOrNull()),
-                (e) => e is ArgumentError || e is NoSuchMethodError);
+      (e) => e is ArgumentError || e is NoSuchMethodError);
 }