title: How do I get the contents within HTML tags of certain attributes (e.g., colspan) using the Ruby gem Mechanize?
body: <p>Here's an example of the HTML:</p>
  
  <pre><code>&lt;td colspan="3"&gt;TARGET&lt;/td&gt;
  &lt;td&gt;NOT TARGET&lt;/td&gt;
  </code></pre>
  
  <p>How do I use Ruby's Mechanize gem to target only the <code>&lt;td&gt;</code> with  <code>colspan="3"</code>?</p>