title: How do I break a string in YAML over multiple lines?
body: <p>In YAML, I have a string that's very long. I want to keep this within the 80-column (or so) view of my editor, so I'd like to break the string. What's the syntax for this?</p>
  
  <p>In other words, I have this:</p>
  
  <pre><code>Key: 'this is my very very very very very very long string'
  </code></pre>
  
  <p>and I'd like to have this (or something to this effect):</p>
  
  <pre><code>Key: 'this is my very very very ' +
       'long string'
  </code></pre>
  
  <p>I'd like to use quotes as above, so I don't need to escape anything within the string.</p>