bagger bag regression from 1494e948
Our `ocrd zip bag` is currently broken: it now gives all files an additional `f.extension`, but then fails to also add that to the `f.url`, used in the METS [here](https://github.com/OCR-D/core/blob/1494e948ab9166b095e7855593df6048da4d1f68/ocrd/ocrd/workspace_bagger.py#L78), too.
diff --git a/ocrd/ocrd/workspace_bagger.py b/ocrd/ocrd/workspace_bagger.py
index 159d51bf..c1021cc4 100644
--- a/ocrd/ocrd/workspace_bagger.py
+++ b/ocrd/ocrd/workspace_bagger.py
@@ -78,7 +78,7 @@ class WorkspaceBagger():
                 if not isdir(file_grp_dir):
                     makedirs(file_grp_dir)
                 self.resolver.download_to_directory(file_grp_dir, f.url, basename="%s%s" % (f.ID, f.extension))
-                f.url = join(f.fileGrp, f.ID)
+                f.url = join(f.fileGrp, f.ID + f.extension)
 
             # save mets.xml
             with open(join(bagdir, 'data', ocrd_mets), 'wb') as f:
['ocrd/ocrd/workspace_bagger.py']