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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def modify(self, current_modified_line, anchors, file_path, file_lines=None, index=None):
 """ Removes the trailing AnchorHub tag from the end of the line being examined. :param current_modified_line: string representing the the line at file_lines[index] _after_ any previous modifications from other WriterStrategy objects :param anchors: Dictionary mapping string file paths to inner dictionaries. These inner dictionaries map string AnchorHub tags to string generated anchors :param file_path: string representing the file_path of the current file being examined by this WriterStrategy :param file_lines: List of strings corresponding to lines in a text file :param index: index of file_lines corresponding to the current line :return: string. A version of current_modified_line that has the AnchorHub tag removed from the end of it """

        open_wrapper_index = current_modified_line.rfind(self._open)
        # '- 1' removes trailing space. May want to modify to completely
        # strip whitespace at the end, instead of only working for a single
        # space
        return current_modified_line[:open_wrapper_index - 1] + "\n"