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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 _write_marker(self, indent_string, depth, entry, comment):
 """Write a section marker line"""

        return '%s%s%s%s%s' % (indent_string,
                               self._a_to_u('[' * depth),
                               self._quote(self._decode_element(entry), multiline=False),
                               self._a_to_u(']' * depth),
                               self._decode_element(comment))