FIX: title missing from revisions dialog

app/serializers/post_revision_serializer.rb

@@ -112,11 +112,11 @@ class PostRevisionSerializer < ApplicationSerializer
   end
 
   def title_changes
-
     prev = "<div>#{previous["title"] && CGI::escapeHTML(previous["title"])}</div>"
     cur = "<div>#{current["title"] && CGI::escapeHTML(current["title"])}</div>"
 
-    return if prev == cur
+    # always show the title for post_number == 1
+    return if object.post.post_number > 1 && prev == cur
 
     diff = DiscourseDiff.new(prev, cur)