Fix outdated reference in debug message

Signed-off-by: Jan Bruckner <jan@janbruckner.de>
diff --git a/library/ssl_msg.c b/library/ssl_msg.c
index 815af7b..2af58a4 100644
--- a/library/ssl_msg.c
+++ b/library/ssl_msg.c
@@ -1884,8 +1884,7 @@
 
     if( ssl->f_recv == NULL && ssl->f_recv_timeout == NULL )
     {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() "
-                            "or mbedtls_ssl_set_bio()" ) );
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() " ) );
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
     }
 
@@ -2100,8 +2099,7 @@
 
     if( ssl->f_send == NULL )
     {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() "
-                            "or mbedtls_ssl_set_bio()" ) );
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() " ) );
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
     }