Move spaces from before comments to within comments

tests/html/postmessage_structured_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
 
 library postmessage_js_test;
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 import 'dart:collection';  // SplayTreeMap
 import 'dart:typed_data';
@@ skipping 50 matching lines @@
       // Map.
 
       final JS_CODE = """
         window.postMessage({eggs: 3}, '*');
         """;
       var completed = false;
       var subscription = null;
       subscription = window.onMessage.listen(expectAsyncUntil(
         (e) {
           var data = e.data;
-          if (data is String) return;    // Messages from unit test protocol.
+          if (data is String) return; //    Messages from unit test protocol.
           completed = true;
           subscription.cancel();
           expect(data, isMap);
           expect(data['eggs'], equals(3));
         },
         () => completed));
       injectSource(JS_CODE);
     });
 
     test('dart-to-js-to-dart-postmessage', () {
       // Pass dictionaries between Dart and JavaScript.
 
       final JS_CODE = """
         window.addEventListener('message', handler);
         function handler(e) {
           var data = e.data;
           if (typeof data == 'string') return;
           if (data.recipient != 'JS') return;
           var response = {recipient: 'DART'};
           response[data['curry']] = 50;
           window.removeEventListener('message', handler);
           window.postMessage(response, '*');
         }
         """;
       var completed = false;
       var subscription = null;
       subscription = window.onMessage.listen(expectAsyncUntil(
         (e) {
           var data = e.data;
-          if (data is String) return;    // Messages from unit test protocol.
+          if (data is String) return; //    Messages from unit test protocol.
           if (data['recipient'] != 'DART') return;  // Hearing the sent message.
           completed = true;
           subscription.cancel();
           expect(data, isMap);
           expect(data['peas'], equals(50));
         },
         () => completed));
       injectSource(JS_CODE);
       window.postMessage({'recipient': 'JS', 'curry': 'peas'}, '*');
     });
@@ skipping 35 matching lines @@
           o.eggs = 3;
           var foo = new MessageEvent('stuff', {data: o});
           window.dispatchEvent(foo);
         })();
       """;
       var completed = false;
       var subscription = null;
       subscription = window.on['stuff'].listen(expectAsyncUntil(
           (MessageEvent e) {
             var data = e.data;
-            if (data is String) return;    // Messages from unit test protocol.
+            if (data is String) return; //    Messages from unit test protocol.
             completed = true;
             subscription.cancel();
             expect(data, isMap);
             expect(data['eggs'], equals(3));
           },
           () => completed));
       injectSource(JS_CODE);
     });
   });
 
@@ skipping 17 matching lines @@
         iframe.contentWindow.postMessage(new HashMap<String,num>(), '*');
       });
       iframe.src = 'about:blank';
       document.body.append(iframe);
 
       return future;
     });
   });
 
 }