message: check argument list length of renewcommand
diff: @@ -254,7 +254,8 @@ export class Command {
  cmds.push(cmd)
  cmdList.push(node.name)
  }
  - if (['newcommand', 'renewcommand', 'providecommand'].indexOf(node.name) > -1 && 'args' in node) {
  + if (['newcommand', 'renewcommand', 'providecommand'].indexOf(node.name) > -1 &&
  + Array.isArray(node.args) && node.args.length > 0) {
  const label = (node.args[0].content[0] as latexParser.Command).name
  let args = ''
  if (latexParser.isOptionalArg(node.args[1])) {
  