'pair' is a really misleading name

[pm100]

'pair' focusses on part of the implementation of the Pair object. For a beginner its really confusing. "A pair of what? What if I have 3 repetitions" . Plus the use of its 'pairiness' is limited for pest consumers. All my code just uses

• as_rule, what type is it
• as_str, what does it say
• into_inner, get its children

I would have liked 'node' better. Would have saved a lot of confusion. I know its not going to change but maybe the docs could explain it better