尝试启动rails后，我运行“bundle install”但收到此消息：
[~/dev/working/sw] rails
git://github.com/airbrake/airbrake.git (at master) is not checked out. Please run `bundle install`
即使收到此消息后，我再次运行“bundle install”，我只是得到：
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
作出回应。
这里发生了什么？