Method format_int

extlibs/fmt/include/fmt/format.h:2892–2892

 public:
  explicit format_int(int value) { format_signed(value); }
  explicit format_int(long value) { format_signed(value); }
  explicit format_int(long long value) { format_signed(value); }
  explicit format_int(unsigned value) : str_(format_decimal(value)) {}