Fixed incorrect indentation in remove_stale_contenttypes.

It's unnecessary for content_type_display to be constructed from
ct_info in every loop iteration.

django/contrib/contenttypes/management/commands/remove_stale_contenttypes.py

@@ -47,7 +47,7 @@ class Command(BaseCommand):
                                 len(objs),
                                 obj_type._meta.label,
                             ))
-                        content_type_display = '\n'.join(ct_info)
+                    content_type_display = '\n'.join(ct_info)
                     self.stdout.write("""Some content types in your database are stale and can be deleted.
 Any objects that depend on these content types will also be deleted.
 The content types and dependent objects that would be deleted are: