message: Fix typo in Redox submodule, fix istty check
diff: @@ -83,8 +83,8 @@ pub fn close(fd: RawFd) -> io::Result<()> {
  }
  pub fn isatty(fd: RawFd) -> bool {
  - if let Ok(fd) = syscall::dup(f, &[]) {
  - let _ = syscall::close(fd);
  + if let Ok(tfd) = syscall::dup(fd, b"termios") {
  + let _ = syscall::close(tfd);
  true
  } else {
  false
  