title: Getting format on save to work with a default formatter
body: <p>I am trying to set a default formatter for a specific workspace to Prettier and make format on save work nicely with each other. I tried this as follows:</p>
  <p><a href="https://i.stack.imgur.com/I1v6v.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/I1v6v.png" alt="enter image description here" /></a>
  <a href="https://i.stack.imgur.com/xmmuR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xmmuR.png" alt="enter image description here" /></a></p>
  <p>(format on save is also enabled in the User settings)</p>
  <p>For some reason, this is not working for me. If I manually run the format command via VS Code's command pallet, it formats using Prettier just fine.</p>
  <p>Is there something I got wrong or another setting that needs configuring?</p>