Method iterator_buffer

src/third-party/fmt/include/fmt/core.h:875–876

 public:
  explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
      : Traits(n), buffer<T>(data_, 0, buffer_size), out_(out) {}
  iterator_buffer(iterator_buffer&& other)
      : Traits(other), buffer<T>(data_, 0, buffer_size), out_(other.out_) {}
  ~iterator_buffer() { flush(); }