Add « and » as alternative string delimiters

[rme]

Emacs kind of chokes on the #:| ... | syntax, so it might be nice to use, say, « (#\u+ab) and » (#\u+bb) as alternative string delimiters.

On a Macintosh, you can type them with option-\ and option-shift-\.

It's possible to make emacs will treat these as string quotes:

(modify-syntax-entry ?« "\"" (standard-syntax-table))
(modify-syntax-entry ?» "\"" (standard-syntax-table))

I don't know if it's worth the trouble, but it's a thought.