for backwards compatibility purposes.
For "new" style callbacks a BN_GENCB structure should be initialised with a
-call to BN_GENCB_set, where B<gencb> is a B<BN_GENCB *>, B<callback> is of
+call to BN_GENCB_set(), where B<gencb> is a B<BN_GENCB *>, B<callback> is of
type B<int (*callback)(int, int, BN_GENCB *)> and B<cb_arg> is a B<void *>.
"Old" style callbacks are the same except they are initialised with a call
-to BN_GENCB_set_old and B<callback> is of type
+to BN_GENCB_set_old() and B<callback> is of type
B<void (*callback)(int, int, void *)>.
A callback is invoked through a call to B<BN_GENCB_call>. This will check