Merge pull request #3423 from ClickHouse/down_no_up

small nit

Author: gingerwizard

docs/dictionary/index.md

@@ -174,7 +174,7 @@ SELECT Id, Title,
 	dictGet('votes_dict', 'DownVotes', Id) AS DownVotes,
 	abs(UpVotes - DownVotes) AS Controversial_ratio
 FROM posts
-WHERE (Id IN (PostIds)) AND (UpVotes > 10) AND (UpVotes > 10)
+WHERE (Id IN (PostIds)) AND (UpVotes > 10) AND (DownVotes > 10)
 ORDER BY Controversial_ratio ASC
 LIMIT 3