[Bug fortran/83560] list-directed formatting of INTEGER is missing plus on output when output open with SIGN='PLUS'

[urbanjost at comcast dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83560

--- Comment #6 from urbanjost at comcast dot net ---
Thanks! As always, I am astonished at what has been accomplished. Fortran's 
viability itself depends so much on the availability of an open compiler.