This particular replacement was done by grep that doesn't know about quasiquotes. 

In general, it'd of course be good if we used quasiquotes instead of manual trees in macro tests, but the amount of code to migrate is significant, and that's been repelling me from doing the migration for quite a long time already. Nevertheless, I've just migrated some of the simple snippets in the subsequent commits. Let's do this one step at a time.