[gfortran] Fixes for p and : format descriptors

[Paul Brook]

> 2004-05-06  Tobias Schlüter <tobias.schlueter@physik.uni-muenchen.de>
>
> 	* io/format.c: Adjust copyright years to fit coding convention.
> 	(parse_format_list): No comma is required after P descriptor.

Applied, thanks.

Paul