GetOpt formatting improvements

[Malcolm Wallace]

> So if people think this is sensible I'll send three patches:
>     1. word-wrap the description to fit in 80 columns
>     2. use less padding between columns
>     3. omit the args on short options when there is also a
>        corresponding long option


These changes all look good to me.  The first one is the most vital,  
the other two I wouldn't mind either way, if anyone else objects for  
good reason.

Regards,
     Malcolm