title: Where can I find the list of supported languages for markdown preview code fence syntax highlight in vscode?
body: <p>I used markdown preview feature in vscode a lot.</p>
  <p>I figured out the code fence syntax highlighting language support in markdown preview panel is different from the list of vscode supported language. I tried to google this, but can not find any useful information.</p>
  <p>For instance, <code>shell</code> in markdown preview code fence is for terminal syntax instead of shellscript/bash and it does not exist in vscode language support.</p>