title: git multiple subject prefix with format-patch
body: <p>I wanted to add more then one subject prefix to my patch while using the <code>format-patch</code> option of git.</p>
  
  <p>The subject should look something like</p>
  
  <pre><code>[Qemu-devel] [PATCH] linux-user/qemu.h Changed ..........
  </code></pre>
  
  <p>How to do this?</p>
  
  <hr>
  
  <p>Doing </p>
  
  <pre><code>git format-patch --subject-prefix="Qemu-Devel PATCH" .....
  </code></pre>
  
  <p>Results in</p>
  
  <pre><code>[Qemu-Devel PATCH] linux-user/qemu.h Changed ..........
  </code></pre>