title: How do I insert variable values into HTML tags in ERB templates?
body: <p>I have a partial like:</p>
  
  <pre><code>&lt;% office.map do |o| %&gt;
     &lt;input id='city' name='company[company_office][0][city]' value=.... type='text' /&gt;
  &lt;% end %&gt;
  </code></pre>
  
  <p>How can I insert a value like <code>o.office</code> into an attribute? <code>value="#{o.office}"</code> does not work.</p>