FIX: Revised post not updated correctly when merging posts.

spec/components/post_merger_spec.rb

@@ -15,7 +15,11 @@ describe PostMerger do
       reply3 = create_post(topic: topic, raw: 'The third reply', post_number: 4, user: user)
       replies = [reply3, reply2, reply1]
 
-      PostMerger.new(admin, replies).merge
+      message = MessageBus.track_publish { PostMerger.new(admin, replies).merge }.last
+
+      expect(message.channel).to eq("/topic/#{topic.id}")
+      expect(message.data[:type]).to eq(:revised)
+      expect(message.data[:post_number]).to eq(reply3.post_number)
 
       expect(reply1.trashed?).to eq(true)
       expect(reply2.trashed?).to eq(true)