def filter_markdown(md, **kwargs):
    """Strip out doctoc Table of Contents for RippleAPI"""
    DOCTOC_START = (
        '<!-- START doctoc generated TOC please keep comment here to allow auto update -->'
        )
    DOCTOC_END = (
        '<!-- END doctoc generated TOC please keep comment here to allow auto update -->'
        )
    doctoc_start_i = md.find(DOCTOC_START)
    doctoc_end_i = md.find(DOCTOC_END)
    if doctoc_start_i != -1 and doctoc_end_i != -1:
        md = md[:doctoc_start_i] + md[doctoc_end_i + len(DOCTOC_END):]
    return md
