rails/rails — pull request #8728 by amatsuda (2013-01-03 19:20:18+00:00)
Title: A small fix for an AR test case

`Car.all` here needs a `to_a` to execute SQL because `Car.all` alone just returns a Relation.

Actually, the test passes without ```base.silence_auto_explain do``` block if not `to_a`'ed.