Convert a concise encoding of jupytext.formats to a list of formats, encoded as dictionaries

def long_form_multiple_formats(jupytext_formats, metadata=None):
    """Convert a concise encoding of jupytext.formats to a list of formats, encoded as dictionaries"""
    if not jupytext_formats:
        return []

    if not isinstance(jupytext_formats, list):
        jupytext_formats = [fmt for fmt in jupytext_formats.split(',') if fmt]

    jupytext_formats = [long_form_one_format(fmt, metadata) for fmt in jupytext_formats]

    return jupytext_formats