method comment suggests (other *_to_s methods are like this). This wasn't an
issue before, but now otherwise Ruby 1.9 prints arrays differently like:
Platform: ["Windows", "Linux", "BSD", "Solaris", "BSDi", "OSX"]
git-svn-id: file:///home/svn/framework3/trunk@7103 4d416f70-5f16-0410-b530-b9f4589650da