Cleanup: fix some CSS comment styles (especially copyrights)

chrome/browser/resources/help/help_content.css

 /* Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
+ * found in the LICENSE file. */
 
 #about-container {
   align-items: center;
   display: flex;
 }
 
 #page-container #about-container {
   margin-top: 10px;
 }
 
@@ skipping 155 matching lines @@
 }
 
 #regulatory-label-container {
   padding-top: 32px;
 }
 
 #regulatory-label {
   display: block;
   width: 330px;
 }