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