renderContainerDocComments

fn renderContainerDocComments(r: *Render, start_token: Ast.TokenIndex) Error!void {
    const tree = r.tree;
    var tok = start_token;
    while (tree.tokenTag(tok) == .container_doc_comment) : (tok += 1) {
        try renderToken(r, tok, .newline);
    }
    // Render extra newline if there is one between final container doc comment and
    // the next token. If the next token is a doc comment, that code path
    // will have its own logic to insert a newline.
    if (tree.tokenTag(tok) != .doc_comment) {
        try renderExtraNewlineToken(r, tok);
    }
}