Assemble a string from the primary name and the given sub- and
    superscripts::

    >>> render_unicode_sub_super(name='alpha', subs=['mu', 'nu'], supers=[2])
    'α_μ,ν^2'

    >>> render_unicode_sub_super(
    ...     name='alpha', subs=['1', '2'], supers=['(1)'], sep='')
    'α₁₂⁽¹⁾'

    >>> render_unicode_sub_super(
    ...     name='alpha', subs=['1', '2'], supers=['(1)'], sep='',
    ...     unicode_sub_super=False)
    'α_12^(1)'

    Args:
        name (str):  the string without the subscript/superscript
        subs (list or None): list of subscripts
        supers (list or None): list of superscripts
        translate_symbols (bool): If True, try to translate (Greek) symbols in
            `name, `subs`, and `supers` to unicode
        unicode_sub_super (bool): It True, try to use unicode
            subscript/superscript symbols
        sep (str): Separator to use if there are multiple
            subscripts/superscripts
        subscript_max_len (int): Maximum character length of subscript that is
            eligible to be rendered in unicode. This defaults to 1, because
            spelling out enire words as a unicode subscript looks terrible in
            monospace (letter spacing too large)

def render_unicode_sub_super(
        name, subs=None, supers=None, sub_first=True, translate_symbols=True,
        unicode_sub_super=True, sep=',', subscript_max_len=1):
    """Assemble a string from the primary name and the given sub- and
    superscripts::

    >>> render_unicode_sub_super(name='alpha', subs=['mu', 'nu'], supers=[2])
    'α_μ,ν^2'

    >>> render_unicode_sub_super(
    ...     name='alpha', subs=['1', '2'], supers=['(1)'], sep='')
    'α₁₂⁽¹⁾'

    >>> render_unicode_sub_super(
    ...     name='alpha', subs=['1', '2'], supers=['(1)'], sep='',
    ...     unicode_sub_super=False)
    'α_12^(1)'

    Args:
        name (str):  the string without the subscript/superscript
        subs (list or None): list of subscripts
        supers (list or None): list of superscripts
        translate_symbols (bool): If True, try to translate (Greek) symbols in
            `name, `subs`, and `supers` to unicode
        unicode_sub_super (bool): It True, try to use unicode
            subscript/superscript symbols
        sep (str): Separator to use if there are multiple
            subscripts/superscripts
        subscript_max_len (int): Maximum character length of subscript that is
            eligible to be rendered in unicode. This defaults to 1, because
            spelling out enire words as a unicode subscript looks terrible in
            monospace (letter spacing too large)
    """
    if subs is None:
        subs = []
    if supers is None:
        supers = []
    if translate_symbols:
        supers = [_translate_symbols(sup) for sup in supers]
        subs = [_translate_symbols(sub) for sub in subs]
        name = _translate_symbols(name)
    res = name
    try:
        if unicode_sub_super:
            supers_modified = [
                    _unicode_sub_super(s, _SUPERSCRIPT_MAPPING)
                    for s in supers]
            subs_modified = [
                    _unicode_sub_super(
                        s, _SUBSCRIPT_MAPPING, max_len=subscript_max_len)
                    for s in subs]
            if sub_first:
                if len(subs_modified) > 0:
                    res += sep.join(subs_modified)
                if len(supers_modified) > 0:
                    res += sep.join(supers_modified)
            else:
                if len(supers_modified) > 0:
                    res += sep.join(supers_modified)
                if len(subs_modified) > 0:
                    res += sep.join(subs_modified)
    except KeyError:
        unicode_sub_super = False
    if not unicode_sub_super:
        sub = sep.join(subs)
        sup = sep.join(supers)
        if sub_first:
            if len(sub) > 0:
                res += "_%s" % sub
            if len(sup) > 0:
                res += "^%s" % sup
        else:
            if len(sup) > 0:
                res += "^%s" % sup
            if len(sub) > 0:
                res += "_%s" % sub
    return res