git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5513 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
iterator to an external iterator. * lib/abbrev.rb: A new library which creates an abbreviation table from a list. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4767 b2dd03c8-39d4-4d8f-98ff-823fe69b080e