improve reviving_old_topic education message

config/locales/server.en.yml

@@ -363,7 +363,7 @@ en:
     reviving_old_topic: |
       ### Revive this topic?
 
-      The last reply to this topic was **%{days}** days ago. Your reply will bump the topic to the top of its list and notify anyone previously involved in the conversation.
+      The last reply to this topic was **%{time_ago}**. Your reply will bump the topic to the top of its list and notify anyone previously involved in the conversation.
 
       Are you sure you want to continue this old conversation?
 

lib/composer_messages_finder.rb

@@ -187,7 +187,7 @@ class ComposerMessagesFinder
       templateName: 'education',
       wait_for_typing: false,
       extraClass: 'education-message',
-      body: PrettyText.cook(I18n.t('education.reviving_old_topic', days: (Time.zone.now - @topic.last_posted_at).round / 1.day))
+      body: PrettyText.cook(I18n.t('education.reviving_old_topic', time_ago: FreedomPatches::Rails4.time_ago_in_words(@topic.last_posted_at, false, scope: :'datetime.distance_in_words_verbose')))
     }
   end
 

spec/components/composer_messages_finder_spec.rb

@@ -442,7 +442,9 @@ describe ComposerMessagesFinder do
 
         it "notifies if last post is old" do
           topic = Fabricate(:topic, last_posted_at: 181.days.ago)
-          expect(described_class.new(user, composer_action: 'reply', topic_id: topic.id).check_reviving_old_topic).not_to be_blank
+          message = described_class.new(user, composer_action: 'reply', topic_id: topic.id).check_reviving_old_topic
+          expect(message).not_to be_blank
+          expect(message[:body]).to match(/6 months ago/)
         end
       end