title: Using markdown in IMarkerData
body: <p>I am trying to implement diagnostics to my language-service. According to the following question I got that I can't use html to customize my 
  messages but I can use markdown syntax. </p>
  
  <p><a href="https://github.com/microsoft/monaco-editor/issues/924" rel="nofollow noreferrer">Can markers support html display just like hoverProvider do?</a></p>
  
  <p>However when I try to use markdown syntax for markers I got the message as it is. </p>
  
  <pre><code> monaco.editor.setModelMarkers(model, this._selector, markers);
   // "# Big Title \\n Please google it   [Google](https://www.google.com) " as a message 
  </code></pre>
  
  <p>I got the string as it is. </p>
  
  <p><a href="https://i.stack.imgur.com/G61VE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/G61VE.png" alt="enter image description here"></a></p>