Converts running-config HEREDOC into EAPI JSON dict

def _multiline_convert(config, start="banner login", end="EOF", depth=1):
        """Converts running-config HEREDOC into EAPI JSON dict"""
        ret = list(config)  # Don't modify list in-place
        try:
            s = ret.index(start)
            e = s
            while depth:
                e = ret.index(end, e + 1)
                depth = depth - 1
        except ValueError:  # Couldn't find end, abort
            return ret
        ret[s] = {"cmd": ret[s], "input": "\n".join(ret[s + 1 : e])}
        del ret[s + 1 : e + 1]

        return ret