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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 collate(binder, ruleset=None, includes=None):
 """Given a ``Binder`` as ``binder``, collate the content into a new set of models. Returns the collated binder. """

    html_formatter = SingleHTMLFormatter(binder, includes)
    raw_html = io.BytesIO(bytes(html_formatter))
    collated_html = io.BytesIO()

    if ruleset is None:
        # No ruleset found, so no cooking necessary.
        return binder

    easybake(ruleset, raw_html, collated_html)

    collated_html.seek(0)
    collated_binder = reconstitute(collated_html)

    return collated_binder