Warning for trigraphs in comment?

[Neil Booth]

Zack Weinberg wrote:-

> > is extracted from Herb's GTW #86 -- full message appended below.
> > I would suggest we warn for trigraphs in comments.
> 
> This was discussed a couple weeks back.  3.4 now warns about ??/\n in
> a comment.  The change is self-contained and could be put into 3.3.1
> if people think that's a good idea.

It's part of the complete reorganization of line lexing, so I don't
think it's an easy patch for 3.3.  I'd be happy to be proved wrong
though.

Neil.