Merge rubygems master(ddbf3203f3857649abe95c73edefc7de7e6ecff4).
It fixed: https://github.com/rubygems/rubygems/issues/2041
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60219 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Added by hsbt (Hiroshi SHIBATA) about 8 years ago
Merge rubygems master(ddbf3203f3857649abe95c73edefc7de7e6ecff4).
It fixed: https://github.com/rubygems/rubygems/issues/2041
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60219 b2dd03c8-39d4-4d8f-98ff-823fe69b080e