title: Strikethrough in markdown codeblock github/gitlab
body: <p>I have an issue on using <code>strikethrough</code> in markdown <code>codeblock</code>.</p>
  
  <p>I can normally add the strike through using two tilde <code>~~</code> in the normal markdown, but when i write the strikethrough in codeblock i can only see <code>~~strikethough~~</code> and not <s>strikethrough</s>.</p>
  
  <p>Example:</p>
  
  <p><strong>Should be:</strong></p>
  
  <blockquote>
    <p>Theory 1 : <s>Some theory part that is irrelevant now but was relevant
    some time ago</s> New theory part added later.</p>
  </blockquote>
  
  <p><strong>Output as:</strong></p>
  
  <blockquote>
    <p>Theory 1 : ~~Some theory part that is irrelevant now but was relevant
    some time ago~~ New theory part added later.</p>
  </blockquote>
  
  <p>I cannot find the usage inside the code block on the markdown.</p>
  
  <p><strong>Is it possible to <code>strikethrough</code> inside <code>codeblock</code> or is it not yet supported.?</strong></p>