/* Force line break before ALL parameters including the first */
dt.sig.sig-object em.sig-param::before {
    content: "\A    ";
    white-space: pre;
}

/* Ensure commas stay inline */
dt.sig.sig-object .w {
    display: inline;
}

/* Add comma after last parameter and force line break after it */
dt.sig.sig-object em.sig-param:last-of-type::after {
    content: ",\A";
    white-space: pre;
}

/* Alternative: target the closing parenthesis directly */
dt.sig.sig-object span.sig-paren:last-of-type::before {
    content: "\A";
    white-space: pre;
}