request for clarification in 7.2.1

[Paul Hargrove]

Currently the next to last sentence of the first paragraph of 7.2 reads

The member functions as_future, as_promise, as_lpc, and as_rpc request notification through a future, promise, LPC, or RPC, respectively.

To my eyes that reads as if it is an exhaustive list, yet it does not include the eager and defer variants on future and promise. So, this is a request to clarify that, for instance via the inclusion of "such as" or perhaps some "wildcard" notation for future and promise.

[Amir Kamil]

Tweak wording about completion member functions to avoid impression that the list is exhaustive. Fixes #184.

→ <<cset 14f855e340da>>