test/rdoc/minitest_helper.rb: partially revert r66286
to resurrect r65613
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66299 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test/rdoc/minitest_helper.rb: partially revert r66286
to resurrect r65613
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66299 b2dd03c8-39d4-4d8f-98ff-823fe69b080e