title: PHPExcel Style getting default number format
body: <p>I have the following code</p>
  
  <pre><code>$xl = new PHPExcel();
  $sheet = xl-&gt;setActiveSheetIndex(0)
  $sheet-&gt;getStyle('A')-&gt;getNumberFormat()-&gt;setFormatCode('#,##0.00');
  $format = $sheet-&gt;getStyle('A')-&gt;getNumberFormat()-&gt;getFormatCode();
  </code></pre>
  
  <p>I'd expect $format to contain <code>#,##0.00</code> but it contains <code>General</code>.</p>
  
  <p>Am I missing something?</p>
  
  <p>PHPExcel v. 1.7.6</p>