Refine code base on comments

Move code to proper macro guards protection
Fix typo issues

Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
diff --git a/library/ssl_client.c b/library/ssl_client.c
index baf82a6..341e882 100644
--- a/library/ssl_client.c
+++ b/library/ssl_client.c
@@ -885,9 +885,9 @@
 
         if( hostname_mismatch )
         {
-            MBEDTLS_SSL_DEBUG_MSG( 1,
-                ( "hostname mismatch the session ticket,"
-                  " should not resume " ) );
+            MBEDTLS_SSL_DEBUG_MSG(
+                1, ( "Hostname mismatch the session ticket, "
+                     "disable session resumption." ) );
             return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
         }
     }