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2015-07-19 22:01 GMT+02:00 Sean Conner <>:
> I think I was confused because
>         ("a"):match "[%%-a]"
> worked, but in playing with it further, it seems that this created a class
> of three characters, '%', '-' and 'a'.  Wierd.

>From the Manual:

The interaction between ranges and classes is not defined. Therefore,
patterns like [%a-z] or [a-%%] have no meaning.