Cleanup: fix some CSS comment styles (especially copyrights)

chrome/browser/resources/history/history.css

Index: chrome/browser/resources/history/history.css
diff --git a/chrome/browser/resources/history/history.css b/chrome/browser/resources/history/history.css
index 810aa55ae9872412097a8ccdf1efdb9fa9356a68..1d4da44ec7672f5e199aa365134f0080816ce637 100644
--- a/chrome/browser/resources/history/history.css
+++ b/chrome/browser/resources/history/history.css
@@ -332,8 +332,7 @@ html[dir='rtl'] .number-visits {
    * directive would show up incorrectly (e.g. '(www.google.com (5'). Using
    * 'embed' makes the engine set the text in the parentheses as LTR even
    * when the layout is set to RTL, which makes using -webkit-*-start
-   * impossible. So use margins and dir='rtl'.
-   */
+   * impossible. So use margins and dir='rtl'. */
   direction: rtl;
   unicode-bidi: embed;
 }