Fix lint error

Author: webstackdev

core/deduplication.py

@@ -75,4 +75,4 @@ def _should_drop_query_parameter(key: str) -> bool:
 
 
 def _is_default_port(scheme: str, port: int) -> bool:
-    return (scheme == "http" and port == 80) or (scheme == "https" and port == 443)
+    return (scheme == "http" and port == 80) or (scheme == "https" and port == 443)

skills/deduplication/SKILL.md

@@ -11,4 +11,4 @@ Decide whether two content items describe the same underlying source article.
 - If the items look related but meaningfully different, return `is_duplicate=false`.
 - `confidence` must stay between 0 and 1.
 
-Return structured JSON with `is_duplicate`, `confidence`, and `explanation`.
+Return structured JSON with `is_duplicate`, `confidence`, and `explanation`.