title: Django / an argument with HttpResponseRedirect is empty in my HTML page
body: <p>In Views.py</p>
  <pre><code>return HttpResponseRedirect('add_scenes?submitted=True?linkToPrevScene=%s'%ScenePrevious)
  </code></pre>
  <p>ScenePrevious is a string containing &quot;water2&quot;</p>
  <p>In my URL of add_scenes.html it works :</p>
  <p><em><a href="http://127.0.0.1:8000/scenes3d/add_scenes?submitted=True?linkToPrevScene=water2" rel="nofollow noreferrer">http://127.0.0.1:8000/scenes3d/add_scenes?submitted=True?linkToPrevScene=water2</a></em></p>
  <p>But in the file add_scenes.html</p>
  <pre><code>   {% if submitted %}
          your scene was submitted successfully after {{ linkToPrevScene }} 
     {% else %}
  </code></pre>
  <p>this HTML code doesn't give output for {{ linkToPrevScene }} although  {% if submitted %} is evaluated correctly</p>
  <p><strong>edit of my post:</strong>
  This line also doesn't work if I replace the second ? by &amp;</p>
  <pre><code>return HttpResponseRedirect('add_scenes?submitted=True&amp;linkToPrevScene=%s'%ScenePrevious)
  </code></pre>