collapse.js in less-rails-bootstrap-2.0.7

- old
+ new

@@ -1,7 +1,7 @@
 /* =============================================================
- * bootstrap-collapse.js v2.0.1
+ * bootstrap-collapse.js v2.0.2
  * http://twitter.github.com/bootstrap/javascript.html#collapse
  * =============================================================
  * Copyright 2012 Twitter, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -72,10 +72,12 @@
       this.$element
         .removeClass('collapse')
         [dimension](size || 'auto')
         [0].offsetWidth
 
-      this.$element.addClass('collapse')
+      this.$element[size ? 'addClass' : 'removeClass']('collapse')
+
+      return this
     }
 
   , transition: function ( method, startEvent, completeEvent ) {
       var that = this
         , complete = function () {
\ No newline at end of file