Possible documentation mismatch for IDDESdelta

In the file OpenFOAM-plus/.../IDDESDelta/IDDESDelta.C , the IDDESdelta seems to be calculated based on face2face distance, in the direction normal to the wall. However, in the H file it is mentioned: IDDESDelta used by the IDDES (improved low Re Spalart-Allmaras DES model) The min and max delta are calculated using the double distance of the min or max from the face centre to the cell centre. Could we check if there is a mismatch between the documentation and the code?