message: Dont add space when doctype has no value
diff: @@ -477,7 +477,10 @@ export const plugin: Plugin = {
  // result += '\n';
  break;
  case 'doctype':
  - result += `doctype ${token.val}`;
  + result += 'doctype';
  + if (token.val) {
  + result += ` ${token.val}`;
  + }
  break;
  case 'dot':
  result += '.';
  