* enum.c: [DOC] Add simple example of Enumerable#zip [ci skip]
  Patch by @nruth on documenting-ruby/ruby#22
  https://github.com/documenting-ruby/ruby/pull/22


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44672 b2dd03c8-39d4-4d8f-98ff-823fe69b080e