Fix poll question with non-underscored locales

Ruby can't have hyphens in method names, so sending something like
`title_pt-BR=` would raise an exception.

app/models/poll/question.rb

@@ -45,7 +45,7 @@ class Poll::Question < ActiveRecord::Base
       self.author = proposal.author
       self.author_visible_name = proposal.author.name
       self.proposal_id = proposal.id
-      send(:"title_#{Globalize.locale}=", proposal.title)
+      send(:"#{localized_attr_name_for(:title, Globalize.locale)}=", proposal.title)
     end
   end
 

spec/models/poll/question_spec.rb

@@ -16,14 +16,31 @@ RSpec.describe Poll::Question, type: :model do
   end
 
   describe "#copy_attributes_from_proposal" do
+    before { create_list(:geozone, 3) }
+    let(:proposal) { create(:proposal) }
+
     it "copies the attributes from the proposal" do
-      create_list(:geozone, 3)
-      p = create(:proposal)
-      poll_question.copy_attributes_from_proposal(p)
-      expect(poll_question.author).to eq(p.author)
-      expect(poll_question.author_visible_name).to eq(p.author.name)
-      expect(poll_question.proposal_id).to eq(p.id)
-      expect(poll_question.title).to eq(p.title)
+      poll_question.copy_attributes_from_proposal(proposal)
+      expect(poll_question.author).to eq(proposal.author)
+      expect(poll_question.author_visible_name).to eq(proposal.author.name)
+      expect(poll_question.proposal_id).to eq(proposal.id)
+      expect(poll_question.title).to eq(proposal.title)
+    end
+
+    context "locale with non-underscored name" do
+      before do
+        I18n.locale = :"pt-BR"
+        Globalize.locale = I18n.locale
+      end
+
+      it "correctly creates a translation" do
+        poll_question.copy_attributes_from_proposal(proposal)
+        translation = poll_question.translations.first
+
+        expect(poll_question.title).to eq(proposal.title)
+        expect(translation.title).to eq(proposal.title)
+        expect(translation.locale).to eq(:"pt-BR")
+      end
     end
   end