Don't clean HTML too much

lib/cross-post/twitter.rb

@@ -31,8 +31,15 @@ class CrossPost
 			parts.each { |p| last = @client.update p, in_reply_to_status: last }
 		end
 
+		WHITESPACE_TAGS = {
+				'br'  => { before: "\n", after: '' },
+				'div' => { before: "\n", after: "\n" },
+				'p'   => { before: "\n", after: "\n" }
+		}.freeze
+
 		def post_status(status)
-			content = Sanitize.clean(status.content).strip
+			content = status.content
+			content = Sanitize.clean(content, whitespace_elements: WHITESPACE_TAGS).strip
 			content = CGI.unescape_html content
 			media   = status.media_attachments.collect { |f| open f.url }