compose HFS file names
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39821 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
compose HFS file names
[ruby-core:48745] [Bug #7267]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39821 b2dd03c8-39d4-4d8f-98ff-823fe69b080e