docs: def print_input_output(opts):
      """
      Prints the input and output directories to the console.
  
      :param opts: namespace that contains printable 'input' and 'output' fields.
      """
      if opts.is_dir:
          print("Root input directory:\t" + opts.input)
          print("Outputting to:\t\t" + opts.output + "\n")
      else:
          print("Input file:\t\t" + opts.input)
          print("Outputting to:\t\t" + opts.output + opts.input + "\n")