Watch the whitespace

I have been spending the last hour wondering why this doesnt work.

Post.find_by_sql["SELECT title FROM posts WHERE author = ? AND created > ?", author_id, start_date]

Its because it needed to be like this:
Post.find_by_sql ["SELECT title FROM posts WHERE author = ? AND created > ?", author_id, start_date]

yeah, you need that whitespace there.