rm [-f|--force] FILE...            Remove one or more files
       rm [-f|--force] PATTERN            Remove multiple files
       rm -r [-f|--force] [FILE|DIRECTORY]... Files and/or directories
       rm -r [-f|--force] PATTERN         Multiple files and/or directories

           Removes files or directories. To remove directories (and
           any contents) -r must be specified.

def do_rm(self, line):
        """rm [-f|--force] FILE...            Remove one or more files
       rm [-f|--force] PATTERN            Remove multiple files
       rm -r [-f|--force] [FILE|DIRECTORY]... Files and/or directories
       rm -r [-f|--force] PATTERN         Multiple files and/or directories

           Removes files or directories. To remove directories (and
           any contents) -r must be specified.

        """
        args = self.line_to_args(line)
        filenames = args.filename
        # Process PATTERN
        sfn = filenames[0]
        if is_pattern(sfn):
            if len(filenames) > 1:
                print_err("Usage: rm [-r] [-f] PATTERN")
                return
            filenames = process_pattern(sfn)
            if filenames is None:
                return

        for filename in filenames:
            filename = resolve_path(filename)
            if not rm(filename, recursive=args.recursive, force=args.force):
                if not args.force:
                    print_err("Unable to remove '{}'".format(filename))
                break