Update concept_map_generator.py

concept_map_generator.py

@@ -219,7 +219,7 @@ def generate_concept_map(json_input: str, output_format: str) -> str:
 
         with NamedTemporaryFile(delete=False, suffix=f'.{output_format}') as tmp:
             dot.render(tmp.name, format=output_format, cleanup=True)
-            return f"{tmp.name}.{output_format}"
+            return tmp.name
 
     except json.JSONDecodeError:
         return "Error: Invalid JSON format"