git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34048 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
documentation from Thomas Leitner <t_leitner AT gmx.at> in
[ruby-core:41616]. [Bug #5752]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34048 b2dd03c8-39d4-4d8f-98ff-823fe69b080e