title: how to represent an empty field in yaml
body: <p>I am working with fixtures on rails and I want one of the fixture fields to be blank.</p>
  
  <p>Example:</p>
  
  <pre><code>two:
  name: test
  path: - I want this blank but not to act as a group heading.
  test: 4
  </code></pre>
  
  <p>But, I do not know how to leave <code>path:</code> blank without it acting as a group title.  Does anybody know how to do that?</p>