Re: Use newer m4_map_args_{w,sep}

[Paolo Bonzini]

>             'autoconf -f'  './config.status --recheck'   size
> Pre-patch:  9.984s         8m42.414s                     977990
> Post-patch: 10.081s        8m3.106s                      973966
> 
> In my mind, the small slowdown in autoconf is tolerable in comparison to the 
> speedup in configure.

Yeah, we have accumulated enough Autoconf speedup that we can definitely
trade it for faster and more readable configure.  BTW, if there is no \
in the AC_DEFINE_UNQUOTED argument you could still use AS_ECHO with a
different second argument, can't you?

Paolo