helper.erb in prmd-0.11.3

- old
+ new

@@ -2,12 +2,12 @@
   def extract_attributes(schema, properties)
     attributes = []
 
     _, properties = schema.dereference(properties)
 
-    properties.each do |key, value|
+    properties.keys.sort.each do |key|
       # found a reference to another element:
-      _, value = schema.dereference(value)
+      _, value = schema.dereference(properties[key])
 
       # include top level reference to nested things, when top level is nullable
       if value.has_key?('type') && value['type'].include?('null') && (value.has_key?('items') || value.has_key?('properties'))
         attributes << build_attribute(schema, key, value)
       end