Cleanup: fix some CSS comment styles (especially copyrights)

chrome/browser/resources/options/subpages_tab_controls.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. */
 
 .subpages-nav-tabs .tab {
   padding: 4px 8px;
   position: relative;
 }
 
 .subpages-nav-tabs .active-tab {
   background: white;
   border: 1px solid #ddd;
   border-bottom: 2px solid white;
   border-top-left-radius: 3px;
   border-top-right-radius: 3px;
   box-shadow: 8px -8px 12px -6px rgb(240, 240, 240);
   position: relative;
 }
 
 /* To avoid tabs changing size when they are clicked and their labels become
  * bold, we actually put two labels inside each tab: an inactive label and an
  * active label. Only one is visible at a time, but the bold label is used to
- * size the tab even when it's not visible. This keeps the tab size constant.
- */
+ * size the tab even when it's not visible. This keeps the tab size constant. */
 .subpages-nav-tabs .active-tab-label,
 .subpages-nav-tabs .tab-label:hover {
   font-weight: bold;
 }
 
 .subpages-nav-tabs .tab-label {
   left: 9px;
   position: absolute;
   top: 5px;
 }
 
 html[dir=rtl] .subpages-nav-tabs .tab-label {
   right: 9px;
 }
 
 .subpages-nav-tabs .active-tab-label,
 .subpages-nav-tabs .active-tab .tab-label {
   visibility: hidden;
 }
 
-/* .tab is not removed when .active-tab is added, so we must
- * override the hidden visibility above in the active tab case.
- */
+/* .tab is not removed when .active-tab is added, so we must override the hidden
+ * visibility above in the active tab case. */
 .subpages-nav-tabs .active-tab .active-tab-label {
   visibility: visible;
 }
 
 .subpages-nav-tabs {
   background-image: linear-gradient(
                         to bottom,
                         rgb(255,255,255),
                         rgb(255,255,255) 60%,
                         rgb(250, 250, 250) 80%,
                         rgb(242,242,242)
   );
   border-bottom: 1px solid #ddd;
   padding: 4px 20px;
 }
 
 .subpages-tab-contents {
    -webkit-padding-start: 10px;
   display: none;
   padding-top: 15px;
 }
 
 .active-tab-contents {
   display: block;
 }