improve assertion error message

tzk/builders.py

@@ -348,7 +348,8 @@ def _private_people_replacement_table(
             elif delegated_publicity_status is False:
                 private_person_tiddlers.append(pt)
                 continue
-            assert delegated_publicity_status is None
+            assert delegated_publicity_status is None, \
+                f"publicity status was {delegated_publicity_status}"
 
         # Default handler.
         with pt.open() as f:

tzk/tw.py

@@ -145,7 +145,7 @@ def _init_gitignore() -> None:
     .peru/
     output/
 
-    \$__StoryList.tid
+    \\$__StoryList.tid
     """).strip()
     with open(".gitignore", "w") as f:
         f.write(GITIGNORE)