fixes generation of the AR querying guide

railties/guides/source/active_record_querying.textile

@@ -560,6 +560,7 @@ Client.where("orders_count > 10").order(:name).reverse_order
 </ruby>
 
 The SQL that would be executed:
+
 <sql>
 SELECT * FROM clients WHERE orders_count > 10 ORDER BY name DESC
 </sql>
@@ -571,6 +572,7 @@ Client.where("orders_count > 10").reverse_order
 </ruby>
 
 The SQL that would be executed:
+
 <sql>
 SELECT * FROM clients WHERE orders_count > 10 ORDER BY clients.id DESC
 </sql>
@@ -621,8 +623,6 @@ You're then responsible for dealing with the conflict by rescuing the exception
 
 NOTE: You must ensure that your database schema defaults the +lock_version+ column to +0+.
 
-<br />
-
 This behavior can be turned off by setting <tt>ActiveRecord::Base.lock_optimistically = false</tt>.
 
 To override the name of the +lock_version+ column, +ActiveRecord::Base+ provides a class method called +set_locking_column+: