title: Rails collection_select set value for include_blank
body: <p>Help me please to solve problem with collection_select.
  When I use:</p>
  
  <pre><code>collection_select(:service, :carmake_id, Carmake.all, :id, :name, include_blank: 'Any')
  </code></pre>
  
  <p>HTML is:</p>
  
  <pre><code>&lt;select id="service_carmake_id" name="service[carmake_id]"&gt;
    &lt;option value=""&gt;Any&lt;/option&gt;
    &lt;option value="12"&gt;Audi&lt;/option&gt;
    &lt;option value="16"&gt;Porsche&lt;/option&gt;
    &lt;option value="17"&gt;VW&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>But I need value="0" for "Any" option.
  Is it possible?</p>
  
  <p>Update:</p>
  
  <pre><code>select(:service, :carmake_id, [['Any', 0]] + Carmake.all.collect { |p| [p.name, p.id]})
  </code></pre>
  
  <p>helped me, but there is railsway? Or I misunderstand something?</p>