Merge rubygems-2.6.13.
see details for this update: http://blog.rubygems.org/2017/08/27/2.6.13-released.html
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59672 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Added by hsbt (Hiroshi SHIBATA) about 8 years ago
Merge rubygems-2.6.13.
see details for this update:
http://blog.rubygems.org/2017/08/27/2.6.13-released.html
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59672 b2dd03c8-39d4-4d8f-98ff-823fe69b080e