FEATURE: allow changing post owners without creating post revision

lib/post_revisor.rb

@@ -101,6 +101,7 @@ class PostRevisor
   # - bypass_rate_limiter:
   # - bypass_bump: do not bump the topic, even if last post
   # - skip_validations: ask ActiveRecord to skip validations
+  # - skip_revision: do not create a new PostRevision record
   def revise!(editor, fields, opts={})
     @editor = editor
     @fields = fields.with_indifferent_access
@@ -134,6 +135,9 @@ class PostRevisor
     @validate_topic = @opts[:validate_topic] if @opts.has_key?(:validate_topic)
     @validate_topic = !@opts[:validate_topic] if @opts.has_key?(:skip_validations)
 
+    @skip_revision = false
+    @skip_revision = @opts[:skip_revision] if @opts.has_key?(:skip_revision)
+
     Post.transaction do
       revise_post
 
@@ -191,6 +195,7 @@ class PostRevisor
   end
 
   def should_create_new_version?
+    return false if @skip_revision
     edited_by_another_user? || !ninja_edit? || owner_changed? || force_new_version?
   end
 
@@ -324,6 +329,7 @@ class PostRevisor
   end
 
   def create_or_update_revision
+    return if @skip_revision
     # don't create an empty revision if something failed
     return unless successfully_saved_post_and_topic
     @version_changed ? create_revision : update_revision