Re-land "Format all multitests"

tests/language/regress_24935_test.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:async';
 
 S() => new Stream.fromIterable([1]);
 
 Future main() async {
-  L: for (var s = 0; s < 10; s++) {
-    await for (var s1 in S()){
-      await for (var s2 in S()){
+  L:
+  for (var s = 0; s < 10; s++) {
+    await for (var s1 in S()) {
+      await for (var s2 in S()) {
         continue L;
       }
     }
   }
   // Regression check: make sure throwing an exception
   // after breaking out of the innermost loop does not
   // crash the VM. In other words, the expected test
   // outcome is an unhandled exception.
   throw "ball"; //# 01: runtime error
 }
-
-