> Well, RFC 23 doesn't mention ^0, and has several examples starting
   > at ^1. And it draws the analogy between ^1, ^2, etc and $1, $2,
   > etc. I didn't make it up.

My apologies. The examples you refer to are incorrect. They were added by
a helper, but the responsibility is mine -- for not checking them
thoroughly enough.

I have corrected the RFC and added further clarifications.
I will repost it soon.

Thanks for catching this error, Glenn.

Damian

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