def prepare_tags_rename_params(from_name_or_tag, to_name_or_tag)
        from, to = [from_name_or_tag, to_name_or_tag].collect do |v|
          prepare_param_tag(v)
        end
        { :old => from, :new => to }
      end
def prepare_tags_rename_params(from_name_or_tag, to_name_or_tag)
        from, to = [from_name_or_tag, to_name_or_tag].collect do |v|
          prepare_param_tag(v)
        end
        { :old => from, :new => to }
      end
Prepares the params for a `tags_rename` call
 and returns a Hash with the params ready for the HTTP request.

 Raises::  WWW::Delicious::Error