title: Laravel maatwebsite/excel Corrupted file when download it
body: <p>I need create a Excel file and download it, but when I downlaoded the file, the file was currupted.
  I searched about this problem and the answer was, 'a space before the php tag', but i cant find, so i save the file in the public folder and there I can open the file, the error just hapen when I download it.</p>
  
  <p>The code:</p>
  
  <pre><code>  Excel::create('relatorio_chamados', function($excel) use($result){
        $excel-&gt;sheet('Relatorio', function($sheet) use($result) {
            $sheet-&gt;with($result);
          });
    })-&gt;store('xlsx');
  </code></pre>
  
  <p>Download:</p>
  
  <pre><code>public function download($nome){
  return response()-&gt;download(public_path()."\\uploads\\".$nome);
  </code></pre>
  
  <p>}</p>
  
  <p>Thanks!</p>