title: Azure DevOps Pull Requests line colours
body: <p>I created a PR and some of lines are marked with red or green colors (in newly created file). Cannot find what does it mean... anyone knows? Below is the example:
  <a href="https://i.stack.imgur.com/upNQT.png" rel="noreferrer"><img src="https://i.stack.imgur.com/upNQT.png" alt="enter image description here" /></a></p>