[texinfo-pretest] new command @s

[Werner LEMBERG]

> > @dmn{...}
> 
> Well, granted, but (after I having skimmed through my Texinfo files)
> 
> i. at dmn{e.}@:
> e. at dmn{g.}@:
> IE at dmn{6}
> Red at dmn{Hat}
> 
> are not good examples of logical markup.  ;)

What about

  i. at dmn{}e.@:
  e. at dmn{}g.@:
  IE at dmn{}6
  Red at dmn{}Hat


    Werner