[rubygems/rubygems] Add missing comma in documentation
https://github.com/rubygems/rubygems/commit/fe9999f2cf
[rubygems/rubygems] Add missing comma in documentation
https://github.com/rubygems/rubygems/commit/fe9999f2cf