Strong mode cleaning of many dart2js tests.

tests/compiler/dart2js/inference/data/super_set.dart

 // Copyright (c) 2017, 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 Super {
   /*Super.field:Union of [[exact=JSUInt31], [exact=Sub]]*/
   var field = 42;
 }
 
 class Sub extends Super {
   /*Sub.method:[subclass=Closure]*/
   method() {
+    // ignore: INVALID_ASSIGNMENT
     var a = super.field = new Sub();
-    return a./*[exact=Sub]*/method;
+    return a. /*[exact=Sub]*/ method;

[Johnni Winther, 2017/06/16 08:36:00]

The added space breaks the inference tests.

[ahe, 2017/06/16 08:50:23]

OK. That's on dartfmt. I'll discuss this in person with you.

   }
 }
 
 /*main:[null]*/
 main() {
-  new Sub()./*[exact=Sub]*/method();
+  new Sub(). /*[exact=Sub]*/ method();
 }