Method doctype

imperative/src/impl/profiler/memory_chunk.cpp:64–71

    ElementGuard element(std::string tag) { return ElementGuard{this, tag}; }
    void text(std::string text) { elements.back().push_back(text); }
    void doctype(std::string element, std::string dtd, std::vector<std::string> args) {
        std::string builder = ssprintf("<!DOCTYPE %s %s", element.c_str(), dtd.c_str());
        for (auto&& arg : args) {
            builder.append(ssprintf(" %s", arg.c_str()));
        }
        builder.append(">\n");
        elements.back().push_back(builder);
    }
    std::string to_string() const {
        mgb_assert(elements.size() == 1 && elements[0].size() >= 1);
        std::string builder;