src/language-markdown/printer-markdown.js/shouldPrePrintTripleHardline
function shouldPrePrintTripleHardline(node, data) {
  const isPrevNodeList = data.prevNode && data.prevNode.type === "list";
  const isIndentedCode =
    node.type === "code" &&
    /\s/.test(data.options.originalText[node.position.start.offset]);

  return isPrevNodeList && isIndentedCode;
}