Trivial observation: these patches obviously introduce many instances of words derived from "cancel", but they don't all conform to established project decisions (cf 21f1e15a) about how to spell them. We follow the common en-US usage: "canceled", "canceling" but "cancellation". Blame Webstah et al.
https://english.stackexchange.com/questions/176957/cancellation-canceled-canceling-us-usage
