When you change this to true, you may need to add more tests.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
this version includes #1114, #1314, #1322, #1375, #1383, #1387
* test/rubygems: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52666 b2dd03c8-39d4-4d8f-98ff-823fe69b080e