refactor the stylesheet

css/stylesheet.css

@@ -1,13 +1,15 @@
-/*Navigation */
+/* navigation */
 ul {
     list-style-type:none;
     overflow: hidden;
     background-color:none;
    image-orientation: left;
 }
+
 li {
     float: right;
 }
+
 li a {
     display: block;
     color: grey;
@@ -15,11 +17,13 @@ li a {
     padding: 18px 16px;
     text-decoration: none;
 }
+
 li a:hover {
     background-color: #111;
 }
+
 li {
     border-right: 1px solid #bbb;
     border-left: 1px solid #bbb;
 }
-/*navigaton end */
+/* navigaton end */