Change the docstring of _values_for_argsort

Author: makbigc

pandas/core/arrays/base.py

@@ -370,6 +370,8 @@ def _values_for_argsort(self) -> Tuple[np.ndarray, np.ndarray]:
         ndarray
             The transformed values should maintain the ordering between values
             within the array.
+        ndarray
+            The mask which indicates the NaN values.
 
         See Also
         --------

pandas/core/arrays/integer.py

@@ -520,6 +520,8 @@ def _values_for_argsort(self) -> Tuple[np.ndarray, np.ndarray]:
         ndarray
             The transformed values should maintain the ordering between values
             within the array.
+        ndarray
+            The mask which indicates the NaN values.
 
         See Also
         --------