def wrap_xml(self, xml, encoding ='ISO-8859-1', standalone='no'):
        """
        Method that provides a standard svg header string for a file
        """
        header = (encoding, standalone) %'''<?xml version="1.0" encoding="%s" standalone="%s"?>'''
        return  header+xml
dataset/ETHPy150Open ofermend/medicare-demo/socialite/jython/Lib/site-packages/pysvg/core.py/BaseElement.wrap_xml/swapped operands of `%`