title: Fix double/single quote warning in visual studio code for Flutter
body: <p>I have recently installed visual studio code and using it to write code in Flutter. But I am getting following warning in all import statements:</p>
  
  <blockquote>
    <p>Prefer double quotes where they won't require escape sequences.
    dart(prefer_double_quotes)</p>
  </blockquote>
  
  <p>There is no quick fix for it and when I change single quotes to double quotes I get warning for double quotes. Although it is not impacting my work but it makes my files look ugly with so many warnings. Any idea to fix it?</p>