Why does the Fortran exit have a leading space?

I process a lot of results from Fortran programs, and it usually seems that the exit from these programs has a leading space, i.e. the character column 1 is empty. Consider a short program leading.f:

      program leading
      print *, "<-- What that space for?"
      end program leading

Does it have a conclusion

 <-- What that space for?

(yes, there is one white space at the beginning). My question is contained in the program.