Format all tests.

tests/language/efficient_length_warning_test.dart

Index: tests/language/efficient_length_warning_test.dart
diff --git a/tests/language/efficient_length_warning_test.dart b/tests/language/efficient_length_warning_test.dart
index 5edfc720c0634fbcac6b82c5b879aea799cc6a7d..5ba2c6fdfc98666cf1d372c913bca23257ff9833 100644
--- a/tests/language/efficient_length_warning_test.dart
+++ b/tests/language/efficient_length_warning_test.dart
@@ -10,7 +10,8 @@ main() {
   // of List<int> and Set<int> is Object.
   // The LUB is now EfficientLengthIterable and it extends Iterable.
   var x = (new Random().nextBool() // Unpredictable condition.
-      ? <int>[1]
-      : new Set<int>.from([1])).first;
+          ? <int>[1]
+          : new Set<int>.from([1]))
+      .first;
   if (x != 1) throw "Wat?";
 }