message: Format vsnprintf
diff: @@ -296,7 +296,12 @@ pub unsafe extern "C" fn vprintf(format: *const c_char, ap: va_list) -> c_int {
  }
  #[no_mangle]
  -pub unsafe extern "C" fn vsnprintf(s: *mut c_char, n: usize, format: *const c_char, ap: va_list) -> c_int {
  +pub unsafe extern "C" fn vsnprintf(
  + s: *mut c_char,
  + n: usize,
  + format: *const c_char,
  + ap: va_list,
  +) -> c_int {
  printf::printf(platform::StringWriter(s as *mut u8, n as usize), format, ap)
  }
  