Fix small documentation inconsistency
Merge pull request #251 from amiel/rsvp-docs-fix

Fix small documentation inconsistency
PromiseEnumerator:

- encapsulates the majority of all/allSettled/hash/hasSettled logic
- prevents some recent performance tuning from exploding the file size
- enables all enumerable methods to share in the perts
[Bugfix] race should not be susceptible to zalgo