lib/flapjack.rb in flapjack-1.4.0 vs lib/flapjack.rb in flapjack-1.5.0rc1

@@ -15,11 +15,11 @@
     Oj.dump(data, :mode => :compat, :time_format => :ruby, :indent => 0)
   end
 
   def self.sanitize(str)
     return str if str.nil? || !str.is_a?(String) || str.valid_encoding?
-    return str.scrub('?') if str.respond_to(:scrub)
-    str.chars.collect {|c| c.valid_encoding? ? c : '_' }.join
+    return str.scrub('?') if str.respond_to?(:scrub)
+    str.chars.collect {|c| c.valid_encoding? ? c : '?' }.join
   end
 
 end