Remove range in ftdetect

Looks like a possibly bad copy-paste:

    $ vim  /Users/jsmith/Documents/joe-dotfiles/vim/bundle/vim-puppet/ftdetect/puppet.vim
    Error detected while processing /Users/jsmith/Documents/joe-dotfiles/vim/bundle/vim-puppet/ftdetect/puppet.vim:
    line    2:
    E481: No range allowed: +au! BufRead,BufNewFile Puppetfile setfiletype ruby
    Press ENTER or type command to continue