title: Removing "utf8=✓" from Rails 3 form submissions
body: <p>I have a simple search form in my Rails 3 app:</p>
  
  <pre><code>&lt;%= form_tag search_path, :method =&gt; "get" do %&gt;
    &lt;%= text_field_tag :q, params[:q] %&gt;
    &lt;%= submit_tag "search", :name =&gt; nil %&gt;
  &lt;% end %&gt;
  </code></pre>
  
  <p>When the user hits the submit button, they get taken to the URL: <a href="http://myapp.com/search?utf8=%E2%9C%93&amp;q=foobar" rel="noreferrer">http://myapp.com/search?utf8=%E2%9C%93&amp;q=foobar</a>
  (where <code>%E2%9C%93</code> gets displayed as a checkmark: ✓).</p>
  
  <p>I'm not doing anything with the <code>utf8</code> parameter, so I want to keep the URL clean by removing it entirely. That is, I want users to get taken to the URL: <a href="http://myapp.com/search?q=foobar" rel="noreferrer">http://myapp.com/search?q=foobar</a> instead.</p>
  
  <p>How do I do this?</p>