Add option to omit URL to `prepare_tweet` helper

app/helpers/social_helper/twitter_methods.rb

@@ -3,7 +3,7 @@ require 'cgi'
 module SocialHelper::TwitterMethods
   include MarkdownHelper
 
-  def prepare_tweet(answer, post_tag = nil)
+  def prepare_tweet(answer, post_tag = nil, omit_url = false)
     question_content = twitter_markdown answer.question.content.gsub(/\@(\w+)/, '\1')
     original_question_length = question_content.length
     answer_content = twitter_markdown answer.content
@@ -13,7 +13,7 @@ module SocialHelper::TwitterMethods
       username: answer.user.screen_name,
       host: APP_CONFIG['hostname'],
       protocol: (APP_CONFIG['https'] ? :https : :http)
-    )
+    ) unless omit_url
 
     parsed_tweet = { :valid => false }
     tweet_text = ""

spec/helpers/social_helper/twitter_methods_spec.rb

@@ -38,6 +38,17 @@ describe SocialHelper::TwitterMethods, :type => :helper do
       end
     end
 
+    context "when the url should be omitted" do
+      let(:question_content) { "question" }
+      let(:answer_content) { "answer" }
+
+      subject { prepare_tweet(answer, nil, true) }
+
+      it "should include the suffix after the link" do
+        expect(subject).to eq("question — answer")
+      end
+    end
+
     context 'when a suffix has been passed and the tweet needs to be shortened' do
       subject { prepare_tweet(answer, '#askracc') }