In RubyGems section [1] of Ruby package guidelines, there should be added following item:
Requires: rubygems
[1] https://fedoraproject.org/wiki/Packaging:Ruby#RubyGems
EASYFIX, will do it (+1:5, 0:0, -1:0)
Announce text:
The Ruby Packaging guidelines were updated to reflect the fact that rubygem packages must have a Requires: rubygems, because that package (rubygems) owns the RubyGems directory structure.
Metadata Update from @spot: - Issue assigned to spot