Tweaked JS and CSS of mark posts plugin

Plugins.md

@@ -69,14 +69,9 @@ A plugin which lets you mark particular posts so you don't forget them in your t
 ``` js
 // mark posts with dbl-click
 $('ol').delegate('a', 'click dblclick', function(e) {
-  e.stopPropagation();
+	e.stopPropagation();
 }).delegate('li', 'dblclick', function(e) {
-  var li = $(this);
-  if(li.hasClass('selected')) {
-    li.removeClass('selected');
-  } else {
-    li.addClass('selected');
-  }
+	$(this).toggleClass('selected');
 });
 ```
 
@@ -85,7 +80,8 @@ And add this to your CSS plugin file:
 ``` css
 /* mark posts with dbl-click */
 .selected {
-  border-left: 5px solid green;
+	border-left: 5px solid green;
+	padding-left: 3px;
 }
 ```