Editor's report for the Coroutines TS

New papers

• N4736 is the current working draft. It replaces N4723.
• N4737 is this Editor's Report for the Coroutines TS.

Changes between N4736 and N4723

• Applied changes from p0913r1 "Add symmetric coroutine control transfer"
• Applied changes from p0914r1 "Add coroutine parameter preview"
• Applied changes from p0911r1 "Rebase coroutine TS to C++17"

Editorial changes

• In comments in synopsis of coroutine handle, reference to a section goes before the rest of the text (for consistency with other comments):

before: // noop coroutine promise 21.11.3 
after:  // 21.11.3 noop coroutine promise

• In Effects and Returns clauses, add period at the end:

before: Effects: None
after:  Effects: None.

before: Returns: true
after:  Returns: true.