minor doc and style fix ups for encoder
diff --git a/test/qcbor_encode_tests.c b/test/qcbor_encode_tests.c
index fcded50..9728a90 100644
--- a/test/qcbor_encode_tests.c
+++ b/test/qcbor_encode_tests.c
@@ -1972,6 +1972,8 @@
       return -9;
    }
    
+   /* QCBOR_ERR_ARRAY_TOO_LONG is not tested here as
+    it would require a 64KB of RAM to test */
 
    return 0;
 }