Index: Lib/shutil.py
===================================================================
--- Lib/shutil.py	(révision 88230)
+++ Lib/shutil.py	(copie de travail)
@@ -391,13 +391,14 @@
     archive_dir = os.path.dirname(archive_name)
 
     if not os.path.exists(archive_dir):
-        logger.info("creating %s" % archive_dir)
+        if logger is not None:
+            logger.info("creating %s", archive_dir)
         if not dry_run:
             os.makedirs(archive_dir)
 
     # creating the tarball
     if logger is not None:
-        logger.info('Creating tar archive')
+        logger.info('creating tar archive')
 
     uid = _get_uid(owner)
     gid = _get_gid(group)