[rubygems/rubygems] Add "gem rebuild" command.
https://github.com/rubygems/rubygems/commit/6d661573f0
[rubygems/rubygems] Add "gem rebuild" command.
https://github.com/rubygems/rubygems/commit/6d661573f0