message: Invert the test
diff: @@ -811,7 +811,7 @@ export class MatrixHandler {
  const [targetRoom] = await this.ircBridge.getStore().getIrcChannelsForRoomId(event.room_id);
  if (command === "nick") {
  const newNick = args[0];
  - if (newNick?.length > 0) {
  + if (!(newNick?.length > 0)) {
  await intent.sendMessage(event.room_id, {
  msgtype: "m.notice",
  body: "You must specify a valid nickname",
  