Re-land "Format all multitests"

tests/language/const_constructor3_test.dart

 // Copyright (c) 2014, 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 C {
   final double d;
   const C(this.d);
 }
 
 class D extends C {
   const D(var d) : super(d);
 }
 
 const c = const C(0.0); //# 01: ok
 const d = const C(0); //# 02: static type warning, checked mode compile-time error
 const e = const D(0.0); //# 03: ok
 const f = const D(0); //# 04: checked mode compile-time error
 
 main() {
   print(c); //# 01: continued
   print(d); //# 02: continued
   print(e); //# 03: continued
   print(f); //# 04: continued
-}
+}