use match > find to get the pos after a match
use match > find to get the pos after a match

The () pattern can be used to capture a position after a match, where
often using find would require setting pos=pos+1 after anyway. This
allows us to spend more time in C and less in the interpreter.

~3% speedup on casual inspection.

grafi-tt/lunajson,grafi-tt/lunajson,grafi-tt/lunajson