Cleanup: fix some CSS comment styles (especially copyrights)

ui/webui/resources/css/tabs.css

 /* Copyright (c) 2012 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. */
 
 tabbox {
   -webkit-box-orient: vertical;
   display: -webkit-box;
 }
 
 tabs {
   -webkit-padding-start: 8px;
   background: -webkit-linear-gradient(white, rgb(243, 243, 243));
   border-bottom: 1px solid rgb(160, 160, 160);
   display: -webkit-box;
   margin: 0;
 }
 
 /* New users of tabs.css should add 'new-style-tabs' to the class list of any
  * 'tabs' or 'tabpanels' elements.
  *
  * TODO(rfevang): Remove when all users are converted to the new style.
- *                (crbug.com/247772).
- */
+ *                (crbug.com/247772). */
 tabs.new-style-tabs {
   -webkit-padding-start: 9px;
   background: #fbfbfb;
   border-bottom: 1px solid #c8c8c8;
   padding-top: 14px;
 }
 
 tabs > * {
   -webkit-margin-start: 5px;
   -webkit-transition: border-color 150ms, background-color 150ms;
@@ skipping 77 matching lines @@
 }
 
 tabpanels > * {
   -webkit-box-flex: 1;
   display: none;
 }
 
 tabpanels > [selected] {
   display: block;
 }