If the query returned 0 results and didn't have any syntax (no intitle:foo)
in it, should we try _harder_ to get suggestions? I don't know exactly what
that changes that means but we can totally implement the retry if we think
it'll help.
The idea is that it might not be performant enough to run super duper
strong suggester settings all the time and when there are no results it
important to have suggestions.
For reference, only 20% of 0 results queries that I counted this morning
returned a suggestion. I don't know how many asked for it though.