When the region has been enabled or augmented as a result of a shifted
motion key, an unshifted motion key will normally deselect the region.
-However, if `unshifted-motion-keys-deselect-region' is t, the region
+However, if `unshifted-motion-keys-deselect-region' is nil, the region
will remain active, augmented by the characters moved over by this
motion key.