title: validate a yaml file locally with ruby on rails?
body: <p>Is there a good way to validate a YAML locally ? 
  I have several YAML issues in production env on deploy, like </p>
  
  <pre><code>https://gist.github.com/anonymous/78bed61832ff72ff3426
  </code></pre>
  
  <p>Not very informative, I would like to know the file this happens in. 
  Is is possible to improve debugging yaml issues a bit more?</p>
  
  <p>Also im not sure why this happens only in production and not in development.</p>