doc: normalize 3DNow! spelling and spacing.

[Ralf Wildenhues]

Hello Gerald,

* Gerald Pfeifer wrote on Sun, Feb 28, 2010 at 07:12:13PM CET:
> On Sun, 28 Feb 2010, Ralf Wildenhues wrote:
> > AMD uses
> > '3D-Now!' (once) and '3DNow' (many times) (both TM-ed) on their website.
> > OK to change the string to '3DNow!' throughout?
> 
> Given that exclamation marks are more tricky (cf. the texinfo escapes
> that you had to add) I would have preferred us to omit those, but looking
> at AMD's site and your actual patch I believe where you write '3DNow' in 
> the above you ment '3DNow!"?

Indeed, I meant to write "AMD uses '3D-Now!' (once) and '3DNow!' (many
times)" above.  Sorry about that.

> > gcc/ChangeLog:
> > 2010-02-28  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
> > 
> > 	* doc/extend.texi (Vector Extensions, X86 Built-in Functions):
> > 	Use '3DNow!' for the extension of that name, ensure normal space
> > 	after the string.
> > 	* doc/invoke.texi (i386 and x86-64 Options): Likewise.
> 
> This is okay.  Do wait until Wednesday before committing it to give
> our colleagues working for AMD the chance to chime in.

Thanks, also for the other part-review (which I've part-committed),
Ralf