Tweak .result() doc

[dandavison]

No description provided.

[cretz]

Suggested change

	fetched, until the most recent one is found. If false, return
	the result from the first run targeted by the request if that run
	ends in a result, otherwise raise an exception.
	fetched, until the most recent one is found. If false, return
	the result or raise an exception for the single run targeted
	by the request without traversing into other runs.

Not necessarily better, just "otherwise raise an exception" isn't really clear that this is because in other cases an exception may causes run traversal. But don't have to change.