Method flush

include/fmt/core.h:858–862

        }

        void flush() {
            auto size = this->size();
            this->clear();
            out_ = copy_str<T>(data_, data_ + this->limit(size), out_);
        }
    public:
        explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
            : Traits(n), buffer<T>(data_, 0, buffer_size), out_(out) {}