Incorrect format of copyright statement for Fortran manuals

[Gerald Pfeifer]

It has been reported via the FSF that 'gfortran.info' is copyrighted by 
the FSF '1999-2008', although it should be under the form '1999, 2000, 
[other years], 2008'.

Indeed the GNU Coding Standards say the following:

  Do not abbreviate the year list using a range; for instance, do not 
  write Β‘1996--1998Β’; instead, write Β‘1996, 1997, 1998Β’. 

And a quick grep finds the following:

  gfac-internals.texi:@set copyrights-gfortran 2007-2010
  gfc-internals.texi:Copyright @copyright{} @value{copyrights-gfortran} Free Software Foundation,
  gfortran.texi:@set copyrights-gfortran 1999-2010
  gfortran.texi:Copyright @copyright{} @value{copyrights-gfortran} Free Software Foundation, Inc.

Would you mind changing this accordingly?

Gerald