title: Bootstrap table, dashes / hyphens in empty cells
body: <p>I am using Wenzhixin's bootstrap-table module. (<a href="http://bootstrap-table.wenzhixin.net.cn/" rel="nofollow noreferrer">http://bootstrap-table.wenzhixin.net.cn/</a>)</p>
  
  <p>When I load my bootstrap table with JSON, and the field is null like this:
  "MyField": null</p>
  
  <p>I see a dash, or hyphen ( - ) inserted into the empty table cell.  What's the best way to turn this off?</p>
  
  <p>Edit: example here <a href="https://jsfiddle.net/3k6qrswf/1/" rel="nofollow noreferrer">https://jsfiddle.net/3k6qrswf/1/</a></p>
  
  <pre><code>    &lt;table id="table" class="table"&gt;
    &lt;thead&gt;
      &lt;tr&gt;
        &lt;th data-field="BookTitle"&gt;Title&lt;/th&gt;
      &lt;/tr&gt;
    &lt;/thead&gt;             
  &lt;/table&gt;
  
      var testData = [
      {"BookTitle": "abc"},
    {"BookTitle": "def"},
    {"BookTitle": null}
  ];
  
  $('#table').bootstrapTable({
              data: testData
          });
  </code></pre>
  
  <p>Thanks</p>