smie-blink-matching-triggers

smie-blink-matching-triggers is a variable defined in `smie.el'.
Its value is

(32 10)

Documentation:
Chars which might trigger `blink-matching-open'.
These can include the final chars of end-tokens, or chars that are
typically inserted right after an end token.
I.e. a good choice can be:
(delete-dups
(mapcar (lambda (kw) (aref (cdr kw) (1- (length (cdr kw)))))
smie-closer-alist))