Error in regex

app/views/workshops/_workshop_previews.html.haml

@@ -1,7 +1,8 @@
+- # encoding: utf-8
 %ul.workshop-previews
 	- workshops.each do |w|
 		- if w.title
 			%li
 				=link_to view_workshop_path(@this_conference.slug, w.id) do
 					%h4=_!(w.title)
-					%p=_!(w.info || '').gsub(/\n\#+(.*?)\r/s, "\n<strong>\\1</strong>\r").gsub(/[\t ]*\r\n[\t ]*/s, '<br>').html_safe
+					%p=_!(w.info || '').gsub(/\n\#+(.*?)\r/, "\n<strong>\\1</strong>\r").gsub(/[\t ]*\r\n[\t ]*/, '<br>').html_safe