code: function addEmptyLineAfter(
    node /*: postcss$node*/,
    newline /*: '\n' | '\r\n'*/
  ) /*: postcss$node*/ {
    const after = _.last(node.raws.after.split(";"));
  
    if (!/\r?\n/.test(after)) {
      node.raws.after = node.raws.after + _.repeat(newline, 2);
    } else {
      node.raws.after = node.raws.after.replace(/(\r?\n)/, `${newline}$1`);
    }
  
    return node;
  }
docs: Add an empty line after a node. Mutates the node.