Translate added !ruby/object:Proc {} to yml file

[Migrate]

Hello,
Let me start by saying that your plugin is very useful. It was a great help to find untranslated strings.
I've used your plugin and it was working fine until it added two lines like the following to en.yml file:
long_ordinal: !ruby/object:Proc {}
Note: I'm using Rails 2.3.2