--- ArgumentError from thread: main
wrong number of arguments (2 for 1)
/home/benjamin/projects/sup/lib/sup/index.rb:422:in `respond_to?'
/home/benjamin/projects/sup/lib/sup/index.rb:422:in `flatten'
/home/benjamin/projects/sup/lib/sup/index.rb:422:in `load_sources'
/home/benjamin/projects/sup/lib/sup/index.rb:108:in `load'
/home/benjamin/projects/sup/lib/sup/util.rb:497:in `send'
/home/benjamin/projects/sup/lib/sup/util.rb:497:in `method_missing'
/home/benjamin/projects/sup/bin/sup:122