Cleanup: fix some CSS comment styles (especially copyrights)

chrome/browser/resources/chromeos/login/screen_supervised_user_creation.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.
  *
  * This is the stylesheet used by the Locally managed user creation flow screen.
  */
 
 #supervised-user-creation {
   height: 609px; /* Same size as GAIA sign in screen.*/
   padding: 0 0;  /* Some screens have elements right next to borders. */
@@ skipping 181 matching lines @@
 
 #supervised-user-creation-managers-pane {
   border: 1px solid #c8c8c8;
   height: 100%;
   margin-top: 20px;
   overflow-x: hidden;
   overflow-y: auto;
 }
 
 /* This class will be set for elements with hide-on-import class by JS when
- * page is used in 'import' mode
- */
+ * page is used in 'import' mode. */
 #supervised-user-creation .hidden-on-import {
   display: none;
 }
 
 #supervised-user-creation-error {
   padding: 175px 120px 0;
   text-align: center;
 }
 
 #supervised-user-creation-error .error-icon {
@@ skipping 337 matching lines @@
 }
 
 #supervised-user-creation-navigation {
   color: rgba(0, 0, 0, .54);
   left: 0;
   position: absolute;
   right: 0;
   top: 0;
   z-index: 1;
 }