copyright years x-z instead of x,y,z

[Simon Josefsson]

Bruno Haible <address@hidden> writes:

> C++ programs will expect the POSIX prototype, even on mingw. On mingw,
> the types are effectively the same (ssize_t = int, socklen_t = int), therefore
> this should not introduce bugs (possibly some warnings, that can be ignored).

I don't have any objection on the technical parts of your patch...

> -   Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
> +   Copyright (C) 2008-2010 Free Software Foundation, Inc.

...however, what is the reason for many occurrences of this changes?
The maintainers manual says:

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

I recall discussions about this, but don't recall the details, other
than that gnulib's now rather widespread use of x-z instead of x,y,z has
led me to believe there has been a change in recommendations from the
FSF, but apparently there haven't been any.

/Simon