improve code format and readability

Signed-off-by: Pengyu Lv <pengyu.lv@arm.com>
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index fc89a44..49b4c2d 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -170,12 +170,10 @@
      * We regard the ticket with incompatible key exchange modes as not match.
      */
     ret = MBEDTLS_ERR_SSL_TICKET_INVALID_KEX_MODE;
-    MBEDTLS_SSL_DEBUG_TICKET_FLAGS(4,
-                                   session->ticket_flags);
+    MBEDTLS_SSL_DEBUG_TICKET_FLAGS(4, session->ticket_flags);
     if (mbedtls_ssl_tls13_check_kex_modes(ssl,
-                                          mbedtls_ssl_tls13_session_get_ticket_flags(session,
-                                                                                     MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_ALL)))
-    {
+                                          mbedtls_ssl_tls13_session_get_ticket_flags(
+                                              session, MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_ALL))) {
         MBEDTLS_SSL_DEBUG_MSG(3, ("No suitable key exchange mode"));
         goto exit;
     }
@@ -2630,11 +2628,11 @@
 #endif
 
     /* Set ticket_flags depends on the advertised psk key exchange mode */
-    mbedtls_ssl_tls13_session_clear_ticket_flags(session,
-                                                 MBEDTLS_SSL_TLS1_3_TICKET_FLAGS_MASK);
+    mbedtls_ssl_tls13_session_clear_ticket_flags(
+        session, MBEDTLS_SSL_TLS1_3_TICKET_FLAGS_MASK);
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_PSK_ENABLED)
-    mbedtls_ssl_tls13_session_set_ticket_flags(session,
-                                               ssl->handshake->tls13_kex_modes);
+    mbedtls_ssl_tls13_session_set_ticket_flags(
+        session, ssl->handshake->tls13_kex_modes);
 #endif
     MBEDTLS_SSL_DEBUG_TICKET_FLAGS(4, session->ticket_flags);