Apply suggestions from code review

docs/en/docs/tutorial/query-params-str-validations.md

@@ -262,9 +262,13 @@ In other words, `None` is not an acceptable runtime value for query parameters
 
 If you want to accept special values (like `"None"` or an empty string) and interpret them as `None` in your application, you can handle them manually in your function:
 
-{* ../../docs_src/query_params_str_validations/tutorial006d_an_py310.py hl[9,11] *}
+{* ../../docs_src/query_params_str_validations/tutorial006d_an_py310.py hl[9:13 18] *}
 
-> **Note**: This example uses `BeforeValidator`, which is only available in **Pydantic v2**.
+/// note
+
+This example uses `BeforeValidator`, which is only available in **Pydantic v2**.
+
+///
 
 ## Query parameter list / multiple values { #query-parameter-list-multiple-values }