Improve documentation in mbedtls_rsa_check_privkey
diff --git a/include/mbedtls/rsa.h b/include/mbedtls/rsa.h
index 55209b0..dc2319c 100644
--- a/include/mbedtls/rsa.h
+++ b/include/mbedtls/rsa.h
@@ -416,13 +416,11 @@
*
* \return 0 if successful, or an \c MBEDTLS_ERR_RSA_XXX error code.
*
- * \note This function performs checks substantiating
- * the consistency of the key material used to setup
- * the RSA context. In case of implementations saving
- * all core RSA parameters, this might mean a consistency
- * check in the sense of \c mbedtls_rsa_validate_params,
- * while other implementations might perform an empirical
- * check consisting of an encryption-decryption pair.
+ * \note The consistency checks performed by this function not only
+ * ensure that \c mbedtls_rsa_private can be called successfully
+ * on the given context, but that the various parameters are
+ * mutually consistent with high probability, in the sense that
+ * \c mbedtls_rsa_public and \c mbedtls_rsa_private are inverses.
*
* \warning This function should catch accidental misconfigurations
* like swapping of parameters, but it cannot establish full