title: include path and invalid escape character in VS code
body: <p>The red underlined text at line 7 in the image below is detected as having an error <strong>invalid escape character in string</strong>.</p>
  <p>This string is a folder path. Why invalid, and how should I do?</p>
  <p><a href="https://i.stack.imgur.com/c1fV9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/c1fV9.png" alt="enter image description here" /></a></p>