Update CHANGELOG regarding #889

Author: batter

CHANGELOG.md

@@ -24,6 +24,8 @@ recommendations of [keepachangelog.com](http://keepachangelog.com/).
 
 ### Fixed
 
+- [#889](https://github.com/airblade/paper_trail/pull/889) -
+  Fix warning message in instances when a version can't be persisted due to validation errors.
 - [#868](https://github.com/airblade/paper_trail/pull/868) -
   Fix usage of find_by_id when primary key is not id, affecting reifying certain records.
 

lib/paper_trail/record_trail.rb

@@ -421,9 +421,8 @@ def habtm_assoc_ids(habtm_assoc)
 
     def log_version_errors(version, action)
       version.logger.warn(
-        "Unable to create version for #{action} of #{@record.class.name}#" +
-          "#{@record.id}: " +
-          version.errors.full_messages.join(", ")
+        "Unable to create version for #{action} of #{@record.class.name}" +
+          "##{@record.id}: " + version.errors.full_messages.join(", ")
       )
     end