Fixed Syntax error

engine.py

@@ -487,7 +487,7 @@ def _format_feedback(result: dict) -> str:
     missed = result.get("missed_keywords", [])
     star_hint = result.get("star_hint", False)
 
-    coverage_line = f"\n\n─────────────────────────
+    coverage_line = f"\n\n─────────────────────────"
     if hit:
         coverage_line += f"\n✅ Found: {', '.join(hit)}"
     if missed: