Make filename optional positional arg
Make filename optional positional arg

gregoiresage/pebble-tool,pebble/pebble-tool,pebble/pebble-tool,pebble/pebble-tool,gregoiresage/pebble-tool,gregoiresage/pebble-tool,pebble/pebble-tool,gregoiresage/pebble-tool