Remove whitespace because Sanitize create \n for <p>

lib/cross-post/twitter.rb

@@ -30,7 +30,7 @@ class CrossPost
 		end
 
 		def post_status(status)
-			content = Sanitize.clean status.content
+			content = Sanitize.clean(status.content).strip
 			content = CGI.unescape_html content
 			media   = status.media_attachments.collect { |f| open f.url }