Function rustfmt_nightly::expr::choose_rhs

fn choose_rhs<R: Rewrite>(
    context: &RewriteContext<'_>,
    expr: &R,
    shape: Shape,
    orig_rhs: Option<String>,
    _rhs_kind: &RhsAssignKind<'_>,
    rhs_tactics: RhsTactics,
    has_rhs_comment: bool
) -> Option<String>