Syntax error by using the code

[saigkill]

I'm used the code like:

FileUtils.cd("#{$musicdir}/#{$folder}") do
    audio = YoutubeDL::Downloader.download_audio("#{$url}", location=".")
  end

sh: -c: Zeile 0: Syntaxfehler beim unerwarteten Wort `('
sh: -c: Zeile 0: `/home/sascha/.rvm/gems/ruby-2.0.0-p353/gems/ruby-youtube-dl-0.0.5/bin/youtube-dl.py --no-progress --extract-audio --audio-format=mp3 --output=.%(stitle)s-%(uploader)s-%(autonumber)s.mp3'
/home/sascha/.rvm/gems/ruby-2.0.0-p353/gems/ruby-youtube-dl-0.0.5/lib/ruby-youtube-dl/downloader.rb:9:in `download_audio': undefined method `[]' for nil:NilClass (NoMethodError)```

It looks like it doesn't extracr the %(stitle)s like templates.
Maybe it can be a solution to remove them from the code...