Kill trailing whitespace in ruby files

app/logical/moderator/dashboard/queries/post_flag.rb

@@ -6,22 +6,22 @@ module Moderator
 
         def self.all(min_date)
           sql = <<-EOS
-            SELECT post_flags.post_id, count(*) 
-            FROM post_flags 
-            JOIN posts ON posts.id = post_flags.post_id 
-            WHERE 
-              post_flags.created_at > ? 
-              AND post_flags.reason <> ? 
+            SELECT post_flags.post_id, count(*)
+            FROM post_flags
+            JOIN posts ON posts.id = post_flags.post_id
+            WHERE
+              post_flags.created_at > ?
+              AND post_flags.reason <> ?
               AND posts.is_deleted = false
               and posts.is_pending = false
-            GROUP BY post_flags.post_id 
-            ORDER BY count(*) DESC 
+            GROUP BY post_flags.post_id
+            ORDER BY count(*) DESC
             LIMIT 10
           EOS
 
           ActiveRecord::Base.select_all_sql(sql, min_date, "Unapproved in three days").map {|x| new(x)}
         end
-      
+
         def initialize(hash)
           @post = Post.find(hash["post_id"])
           @count = hash["count"]