clean-notes

@@ -134,7 +134,7 @@ yaml.nodes.ScalarNode.__hash__ = scalar_node_hash
 def compose_mapping_node(self, anchor):
     start_event = self.get_event()
     tag = start_event.tag
-    if tag is None or tag == u"!":
+    if tag is None or tag == "!":
         tag = self.resolve(yaml.nodes.MappingNode, None, start_event.implicit)
     node = yaml.nodes.MappingNode(
         tag, [], start_event.start_mark, None, flow_style=start_event.flow_style
@@ -174,7 +174,8 @@ def check_notes_validity(notes, testedpkgs):
                 pass
             else:
                 log.critical(
-                    "the package %s is not known to the testing system. Maybe it's misspelled?",
+                    "the package %s is not known to the testing system. Maybe it's misspelled or removed? Check https://tracker.debian.org/pkg/%s",
+                    pkg,
                     pkg,
                 )
                 errors = True