Change as recommended

doc/source/whatsnew/v0.24.0.txt

@@ -21,7 +21,7 @@ the user to override the engine's default behavior to include or omit the
 dataframe's indexes from the resulting Parquet file. (:issue:`20768`)
 - :meth:`DataFrame.corr` and :meth:`Series.corr` now accept a callable for generic calculation methods of correlation, e.g. histogram intersection (:issue:`22684`)
 - :func:`DataFrame.to_string` now accepts ``decimal`` as an argument, allowing
-the user to use a decimal separator. (:issue:`23614`)
+the user to specify which decimal separator should be used in the output. (:issue:`23614`)
 
 .. _whatsnew_0240.enhancements.extension_array_operators: