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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 fix_e502(self, result):
 """Remove extraneous escape of newline."""

        (line_index, _, target) = get_index_offset_contents(result,
                                                            self.source)
        self.source[line_index] = target.rstrip('\n\r \t\\') + '\n'