[Bug] Camel killer box and box dots gives unexpected behaviour

[antonymilne]

Hello! Thank you for this awesome package. The combination of camel killer box and box dots does exactly what I'm looking for. Well, almost - there's a couple of behaviours that are not working quite as I expected. I'm not sure how many of these are bugs or just my expectations are wrong but hopefully you can explain!

from box import Box

b = Box({"someKey": ["a"]}, camel_killer_box=True, box_dots=True)
b["some_key"]
# works as expected: BoxList(['a'])

b["some_key[0]"]
# works as expected: 'a'

b["someKey"]
# works but I don't know if it should? From the docs it sounds like the original camel-case
# version should have been destroyed completely, but this gives BoxList(['a'])

b["someKey[0]"]
# raises BoxKeyError - not sure whether this should work, but given that just "someKey" worked above
# it feels inconsistent at any rate

b["SomeKey"]
# works but I wouldn't expect it to! Is this meant to work?