@marko/prettyprint/dist/printDocumentType.js

Prettyprint Marko template files in the syntax of your choice

"use strict";

module.exports = function printDocumentType(node, printContext, writer) {
  var doctype = node.documentType.value;

  if (printContext.preserveWhitespace !== true) {
    doctype = doctype.trim();
  }

  writer.write("<!" + doctype + ">" + printContext.eol);
};