title: Is it .yaml or .yml?
body: <p>According to <a href="http://www.yaml.org/faq.html">yaml.org</a>, the official file extension is <code>.yaml</code>. </p>
  
  <p>Quote: </p>
  
  <blockquote>
    <h3>Is there an official extension for YAML files?</h3>
    
    <p>Please use ".yaml" when possible.</p>
  </blockquote>
  
  <p>However there seems to be a disagreement on the internet on which extension to use. If you look up <a href="https://github.com/gitlabhq/gitlabhq/tree/6-4-stable/config">examples on the web</a>, many of them use the unsanctioned <code>.yml</code> extension. </p>
  
  <p>Searching Google returns nearly 3 times as many results for the shorter one.</p>
  
  <hr>
  
  <p><img src="https://i.stack.imgur.com/PC5Gn.png" alt="enter image description here"><br>
  49,100</p>
  
  <hr>
  
  <p><img src="https://i.stack.imgur.com/vqc4S.png" alt="enter image description here"><br>
  15,400</p>
  
  <hr>
  
  <p>So which am I supposed to use? The proper 4 letter extension suggested by the creator, or the 3 letter extension found in the wild west of the internet? </p>