tots agree. I was just copy/pasting what was already in the Facter repo. Would you like me to update these PRs and submit a new one against Facter correcting that?

If I'm updating the code would you mind if I just made it:
```ruby
source ENV['GEM_SOURCE'] || "https://rubygems.org"
```

(That's what I had originally done until I saw there was this in Facter)