Format all multitests

tests/language/type_promotion_logical_and_test.dart

 // Copyright (c) 2013, 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.
 
 // Test type promotion of locals potentially mutated.
 
 class A {
   var a = true;
 }
+
 class B extends A {
   var b = true;
 }
+
 class C extends B {
   var c = true;
 }
+
 class D extends A {
   var d = true;
 }
+
 class E implements C, D {
   var a = true;
   var b = true;
   var c = true;
   var d = true;
 }
 
 void main() {
   A a = new E();
   var b;
   if (a is D && ((a = new D()) != null)) {
     b = a.d; //# 01: static type warning
   }
   if (a is D && (b = a.d)) {
     b = a.d; //# 02: static type warning
     a = null;
   }
   if ((((a) is D) && (b = (a).d))) {
     b = a.d; //# 03: static type warning
     a = null;
   }
   if (f(a = null) && a is D) {
     b = a.d;
   }
 }
 
 bool f(x) => true;