a patch from Kazuhiro NISHIYAMA <zn at mbf.nifty.com>.
[ruby-dev:30713]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12184 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
which included commits to RCS files with non-trunk default branches.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@373 b2dd03c8-39d4-4d8f-98ff-823fe69b080e