trigraphs in X3J11

[Henry Spencer]

> Consider:
> 	#trigraph ??

You can't even write this without trigraphs, because # is one of the magic
characters that may not exist in the source character set.

I don't much like trigraphs, and I think there are more graceful approaches
(like saying "use ISO Latin 1", which eliminates the problem), but you can
be fairly sure that X3J11 has already thought of all the simplistic quick
fixes and turned them down for one reason or another.