code: def _make_multiple_arg(self, arg_name, arg_list):
      
      unique_args = list(set(arg_list))
  
      args = [(arg_name, f) for f in unique_args]
      flattened = list(sum(args, ()))
  
      return flattened
docs: Jacoco cli allows the specification of multiple values for certain args by repeating the
      argument with a new value. E.g. --classfiles a.class --classfiles b.class, etc. This method
      creates a list of strings interleaved with the arg name to satisfy that format.