Cleanup: fix some CSS comment styles (especially copyrights)

chrome/browser/resources/ntp4/new_incognito_tab_theme.css

 /* Copyright 2013 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. */
 
 html {
   background-attachment: fixed;
   background-color: $i18n{colorBackground};
   background-position: $i18n{backgroundBarDetached};
   background-repeat: $i18n{backgroundTiling};
   height: 100%;
   overflow: auto;
 }
 
 html[hascustombackground='true'] {
   background-image: url(chrome://theme/IDR_THEME_NTP_BACKGROUND?$i18n{themeId});
 }
 
 html[bookmarkbarattached='true'] {
   background-position: $i18n{backgroundBarAttached};
 }
 
 #attribution-img {
   content: url(chrome://theme/IDR_THEME_NTP_ATTRIBUTION?$i18n{themeId});
 }