doc: Mnemonics for cdict and sdict

[vain]

IMHO, cdict and sdict are not such great names. 🥴 It is not obvious what they mean. In the beginning, I thought cdict meant “current dict” and sdict meant “should (be) dict”, which is the wrong way around. I heard from other people that they mix up the dicts very often.

So, apparently cdict stands for “config dict”, so it’s a dict describing the configuration in your repo. Whereas sdict stands for … what does it stand for? 🥴 If thought it was “statedict”, but the docs start with:

To represent supposed vs. actual state, BundleWrap uses statedicts.

So, both cdict and sdict are “statedicts”? What’s sdict then?

I still went with “_s_dict stands for state dict”, because this makes sense in the context of the sentence.

(If I were to choose new names, I’d go with state_on_node instead of sdict and state_as_configured instead of cdict.)