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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 visit_module(self, node):
 """return an astroid.Module node as string"""

        docs = '"""%s"""\n\n' % node.doc if node.doc else ""
        return docs + "\n".join(n.accept(self) for n in node.body) + "\n\n"