Updates following review feedback

Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2609)

ssl/ssl_lib.c

@@ -1721,7 +1721,7 @@ int SSL_shutdown(SSL *s)
 int SSL_key_update(SSL *s, int updatetype)
 {
     /*
-     * TODO(TLS1.3): How will applications know whether TLSv1.3+ has been
+     * TODO(TLS1.3): How will applications know whether TLSv1.3 has been
      * negotiated, and that it is appropriate to call SSL_key_update() instead
      * of SSL_renegotiate().
      */

ssl/statem/statem_clnt.c

@@ -735,7 +735,6 @@ WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
     case TLS_ST_CW_KEY_UPDATE:
         if (statem_flush(s) != 1)
             return WORK_MORE_A;
-
         if (!tls13_update_key(s, 1))
             return WORK_ERROR;
         break;

ssl/statem/statem_srvr.c

@@ -843,7 +843,6 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst)
     case TLS_ST_SW_KEY_UPDATE:
         if (statem_flush(s) != 1)
             return WORK_MORE_A;
-
         if (!tls13_update_key(s, 1))
             return WORK_ERROR;
         break;