lib/nanoc/data_sources/filesystem.rb in nanoc-4.9.5 vs lib/nanoc/data_sources/filesystem.rb in nanoc-4.9.6

@@ -199,12 +199,11 @@
 
       res
     end
 
     def content_checksum_data_for(proto_doc)
-      Digest::SHA1.digest(
-        proto_doc.content_checksum_data || '',
-      )
+      data = proto_doc.content_checksum_data
+      data ? Digest::SHA1.digest(data) : nil
     end
 
     def attributes_checksum_data_for(proto_doc, content_filename, meta_filename)
       Digest::SHA1.digest(
         Marshal.dump(