Since there is `bundled_gems.rb` it is not always one. Fixes the following:
```sh
$ ruby -w -rbundler/inline -e "gemfile {}; require 'cgi'"
/home/earlopain/.rbenv/versions/ruby-dev/lib/ruby/3.5.0+0/bundled_gems.rb:59: warning: CGI library is removed from Ruby 3.5. Please use cgi/escape instead for CGI.escape and CGI.unescape features.
If you need to use the full features of CGI library, Please install cgi gem.
```

into:

```sh
$ ruby -w -rbundler/inline -e "gemfile {}; require 'cgi'"
-e:1: warning: CGI library is removed from Ruby 3.5. Please use cgi/escape instead for CGI.escape and CGI.unescape features.
If you need to use the full features of CGI library, Please install cgi gem.
```