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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 _format_newlines(prefix, formatted_node, options):
 """ Convert newlines into U+23EC characters, followed by an actual newline and then a tree prefix so as to position the remaining text under the previous line. """

    replacement = u''.join([
        options.NEWLINE,
        u'\n',
        prefix])
    return formatted_node.replace(u'\n', replacement)