"sub-clause" should be subclause

[jwakely]

There are several occurrences of "sub-clause" in the TS, which should not be hyphenated.

[func.wrap.func] says:

The specification of all declarations within this sub-clause 4.2 and its sub-clauses

I think this should just say "within subclause 4.2" and that first subclause should not be a hanging paragraph

[futures.promise] and [futures.task] both say "within this sub-clause 7.x and its sub-clauses" but there are no subclauses.