def alias_command(command_table, existing_name, new_name):
 current = command_table[existing_name]
 _copy_argument(command_table, existing_name, new_name)
 current._UNDOCUMENTED = True

def alias_command ( command_table , existing_name , new_name ) : current = command_table [ existing_name ] _copy_argument ( command_table , existing_name , new_name ) current . _UNDOCUMENTED = True
moves an argument to a new name .