Format all tests.

tests/corelib/big_integer_huge_mul_vm_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Testing Bigints with and without intrinsics.
 // VMOptions=
 // VMOptions=--no_intrinsify
 
 library big_integer_test;
+
 import "package:expect/expect.dart";
 
 testBigintHugeMul() {
   var bits = 65536;
   var a = 1 << bits;
-  var a1 = a - 1;  // all 1's
+  var a1 = a - 1; // all 1's
   var p1 = a1 * a1;
   var p2 = a * a - a - a + 1;
   // Use isTrue instead of equals to avoid trying to print such big numbers.
   Expect.isTrue(p1 == p2, 'products do not match');
 }
 
 main() {
   testBigintHugeMul();
 }