When serializing polls over OStatus, serialize poll options to text (#10160)

* When serializing polls over OStatus, serialize poll options to text

* Do the same for RSS feeds

* Use “[ ] ” as a prefix for poll options instead of “- ”

app/lib/formatter.rb

@@ -19,6 +19,10 @@ class Formatter
 
     raw_content = status.text
 
+    if options[:inline_poll_options] && status.poll
+      raw_content = raw_content + '\n\n' + status.poll.options.map { |title| "[ ] #{title}" }.join('\n')
+    end
+
     return '' if raw_content.blank?
 
     unless status.local?