Additional configuration options were added in response to thise request #345

But the setting line_length: 80 is not picked up by gdformat due to the default being specific in docopt.

This if case will always return true

 line_length = ( int(arguments["--line-length"]) if arguments["--line-length"] else config.get("line_length", DEFAULT_CONFIG["line_length"]) ) 

since docopt will add the --line-length argument if missing.

Since the default is now handled by DEFAULT_CONFIG, one solution is to just remove the default from docopt.