Ruff misidentifies config as a dict

Co-authored-by: Tzu-ping Chung <[email protected]>

Author: cclauss

src/pip/_internal/commands/debug.py

@@ -134,6 +134,8 @@ def show_tags(options: Values) -> None:
 
 
 def ca_bundle_info(config: Configuration) -> str:
+    # Ruff misidentifies config as a dict.
+    # Configuration does not have support the mapping interface.
     levels = {key.split(".")[0] for key, _ in config.items()}  # noqa: PERF102
     if not levels:
         return "Not specified"