-/// Position c'tors. Here we always create a copy of the original position
-/// or the FEN string, we want the new born Position object do not depend
-/// on any external data so we detach state pointer from the source one.
+/// Position::copy() creates a copy of 'pos'. We want the new born Position
+/// object do not depend on any external data so we detach state pointer from
+/// the source one.