title: What does the shrink-to-fit viewport meta attribute do?
body: <p>I'm having trouble finding documentation for this. Is it Safari specific?</p>
  
  <p>There was a recent bug in iOS 9 (<a href="http://kihlstrom.com/2015/shrink-to-fit-no-fixes-zoom-problem-in-ios-9/" rel="noreferrer">here</a>), the solution to which is adding <code>shrink-to-fit=no</code> to the viewport meta. </p>
  
  <p>What does this code do?</p>