Invalid gemname

https://github.com/bundler/bundler-features/issues/6

bundler/bundler-features issue #6

I added this to  def oudated(*gems)

    gems.each do |gem_name|
        select_spec(gem_name)
     end

Now  when I run
   
    $ dbundle outdated serv
        Could not find gem 'serv'.
        Did you mean sdoc?