convert with one converter
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39822 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
convert with one converter
of re-creating converters for each buffer expansion.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39822 b2dd03c8-39d4-4d8f-98ff-823fe69b080e