[library-web] misc: add debug logging to mallard documentation combination

[Frederic Peters <fpeters src gnome org>]

commit 88e77c1c371fc9090cb3919091d71f042f96dd4c
Author: Frédéric Péters <fpeters 0d be>
Date:   Mon Aug 10 16:28:07 2015 +0200

    misc: add debug logging to mallard documentation combination

 src/modtypes/mallard.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/modtypes/mallard.py b/src/modtypes/mallard.py
index 751b76b..01887cf 100644
--- a/src/modtypes/mallard.py
+++ b/src/modtypes/mallard.py
@@ -538,3 +538,4 @@ class MallardModule(DocModule):
         if not self.extended_by_documents:
             self.extended_by_documents = []
         self.extended_by_documents.append(doc)
+        logging.debug('mallard combination of %r and %r' % (self, doc))