renderSlice

fn renderSlice(
    r: *Render,
    slice_node: Ast.Node.Index,
    slice: Ast.full.Slice,
    space: Space,
) Error!void {
    const tree = r.tree;
    const after_start_space_bool = nodeCausesSliceOpSpace(tree.nodeTag(slice.ast.start)) or
        if (slice.ast.end.unwrap()) |end| nodeCausesSliceOpSpace(tree.nodeTag(end)) else false;
    const after_start_space = if (after_start_space_bool) Space.space else Space.none;
    const after_dots_space = if (slice.ast.end != .none)
        after_start_space
    else if (slice.ast.sentinel != .none) Space.space else Space.none;

    try renderExpression(r, slice.ast.sliced, .none);
    try renderToken(r, slice.ast.lbracket, .none); // lbracket

    const start_last = tree.lastToken(slice.ast.start);
    try renderExpression(r, slice.ast.start, after_start_space);
    try renderToken(r, start_last + 1, after_dots_space); // ellipsis2 ("..")

    if (slice.ast.end.unwrap()) |end| {
        const after_end_space = if (slice.ast.sentinel != .none) Space.space else Space.none;
        try renderExpression(r, end, after_end_space);
    }

    if (slice.ast.sentinel.unwrap()) |sentinel| {
        try renderToken(r, tree.firstToken(sentinel) - 1, .none); // colon
        try renderExpression(r, sentinel, .none);
    }

    try renderToken(r, tree.lastToken(slice_node), space); // rbracket
}