Correct typo in rsa.h
@@ -79,7 +79,7 @@ extern "C" {
/**
* \brief Compute RSA prime moduli P, Q from public modulus N=PQ
-& and a pair of private and public key.
+ * and a pair of private and public key.
*
* \note This is a 'static' helper function not operating on
* an RSA context. Alternative implementations need not
