lib/xml/mixup.rb in xml-mixup-0.1.1 vs lib/xml/mixup.rb in xml-mixup-0.1.2

@@ -253,10 +253,14 @@
           # supplant with attributes if present
           pub ||= attr[:public] if attr[:public]
           sys ||= attr[:system] if attr[:system]
 
           # XXX for some reason this is an *internal* subset?
-          node = doc.create_internal_subset(root, pub.to_s, sys.to_s)
+          # anyway these may not be strings and upstream is not forgiving
+          node = doc.create_internal_subset(root.to_s,
+                                            pub.nil? ? pub : pub.to_s,
+                                            sys.nil? ? sys : sys.to_s)
+
 
           # at any rate it doesn't have to be explicitly attached
 
           # attach it to the document
           #doc.add_child node