Re-land "Format all multitests"

tests/language_strong/external_test.dart

 // Copyright (c) 2012, 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.
 
 class Bar {
   Bar(val);
 }
 
 class Foo {
   var x;
@@ skipping 16 matching lines @@
   external Foo.n22(val) { x = 1; } // //# 22: compile-time error
   external factory Foo.n23(val) => new Foo(); // //# 23: compile-time error
   external Foo.n24(this.x); // //# 24: compile-time error
   external factory Foo.n25(val) = Bar; // //# 25: compile-time error
 }
 
 external int t06(int i) { } // //# 30: compile-time error
 external int t07(int i) => i + 1; // //# 31: compile-time error
 
 main() {
-
   // Ensure Foo class is compiled.
   var foo = new Foo();
 
   // Try calling an unpatched external function.
   new Foo().f10(); //                                   //# 10: continued
   new Foo().f11(); //                                   //# 11: continued
   new Foo().f12(); //                                   //# 12: continued
   Foo.f13(); //                                         //# 13: continued
   Foo.f14(); //                                         //# 14: continued
   new Foo().f16(); //                                   //# 16: continued
 
   // Try calling an unpatched external constructor.
   new Foo.n20(1); //                                     //# 20: continued
   new Foo.n21(1); //                                     //# 21: continued
   new Foo.n22(1); //                                     //# 22: continued
   new Foo.n23(1); //                                     //# 23: continued
   new Foo.n24(1); //                                     //# 24: continued
   new Foo.n25(1); //                                     //# 25: continued
 
   t06(1); //                                            //# 30: continued
   t07(1); //                                            //# 31: continued
 }