title: jQuery Autocomplete selected value always has trailing comma
body: <p>I am using jQuery autocomplete with MVC3 and Razor engine and it is able to retrieve my list from my actionResult. However when I click on an item in the autocomplete list there is always a comma at the end.</p>
  
  <p><strong>HTML</strong></p>
  
  <pre><code>&lt;div class="editor-field"&gt;
      @Html.EditorFor(model =&gt; Model.group_name, new { ID = "group_name" })
      @Html.ValidationMessageFor(model =&gt; Model.group_name)
  &lt;/div&gt;
  </code></pre>
  
  <p><strong>JS</strong></p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
      $(document).ready(function () {
          $("#group_name").autocomplete('@Url.Action("LookUpGroupName")', // Call LookUpGroupName ActionResult in UserManager Controller
          {
          dataType: 'json',
          parse: function (data) {
              var rows = new Array();
              for (var i = 0; i &lt; data.length; i++) {
                  rows[i] = {
                      data: data[i],
                      value: data[i].group,
                      result: data[i].group
                  }
              }
              return rows;
          },
          formatItem: function (row, i, max) {
              return row.group
          },
          width: 300,
          highlight: false,
          multiple: true
          //        multipleseparator: ","
      }); // End of autocomplete
  });
  &lt;/script&gt;
  </code></pre>
  
  <p>Response body of my request from typing the letter a</p>
  
  <pre><code>[{"group":"A Tout France"},{"group":"Abba Blinds"},{"group":"Aberdeen Journals"},{"group":"Account suspended South West Media Group"},{"group":"Acumen Marketing Communications"},{"group":"Acumen Partners"},{"group":"adz media ltd"},{"group":"Aka Ltd"},{"group":"AL Marketing Communications"},{"group":"Alchemy Direct Media"}]
  </code></pre>
  
  <p>If I select A Tout France from using my autocomplete the value in the textbox will be:</p>
  
  <p>A Tout France,</p>
  
  <p>Any idea how to get rid of the trailing comma?</p>