stacking is well defined for rationals (and in case of base ring cdd reals as well)

Author: Jonathan Kliem

src/sage/geometry/polyhedron/base.py

@@ -4343,7 +4343,7 @@ def stack(self, face, position=None):
 
         - ``face`` -- a PolyhedronFace
 
-        - ``position`` -- a positive integer. Determines a relative distance
+        - ``position`` -- a positive number. Determines a relative distance
           from the barycenter of ``face``. A value close to 0 will place the
           new vertex close to the face and a large value further away. Default
           is `1`. If the given value is too large, an error is returned.