fix various issues

- improve document about configuration item.
- format issue
- variable type issue.

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index eea7f09..3df1677 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -1581,7 +1581,9 @@
 /**
  * \def MBEDTLS_SSL_TLS1_3_DEFAULT_NEW_SESSION_TICKETS
  *
- * Default number of NewSessionTicket. This is not used in TLS 1.2.
+ * Default number of NewSessionTicket messages to be sent by a TLS 1.3 server
+ * after handshake completion. This is not used in TLS 1.2 and relevant only if
+ * the MBEDTLS_SSL_SESSION_TICKETS option is enabled.
  *
  */
 #define MBEDTLS_SSL_TLS1_3_DEFAULT_NEW_SESSION_TICKETS 1
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 7e060d3..e2546ff 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -625,7 +625,7 @@
     uint8_t tls13_kex_modes; /*!< Key exchange modes supported by the client */
 #endif
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-    int new_session_tickets_count;         /*!< number of session tickets */
+    uint16_t new_session_tickets_count;         /*!< number of session tickets */
 #endif
 #endif /* MBEDTLS_SSL_SRV_C */
 
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index de6bae2..c9aea48 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -674,7 +674,6 @@
     !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
     mbedtls_pk_init( &handshake->peer_pubkey );
 #endif
-
 }
 
 void mbedtls_ssl_transform_init( mbedtls_ssl_transform *transform )