nixos/test-driver: fix wording in error message about invalid node names

Since 113a6b9325b92d483e6c2f12c35c2887ab175a8d the test driver
explicitly ensures if the node names won't break the resulting Perl
script at runtime. This slightly improves the correctness of the error
message.

1 files changed, 2 insertions, 2 deletions

diff --git a/nixos/lib/testing.nix b/nixos/lib/testing.nix
index 96a42c2f305..57b4412d9bb 100644
--- a/nixos/lib/testing.nix
+++ b/nixos/lib/testing.nix
@@ -164,8 +164,8 @@ in rec {
       if lib.length invalidNodeNames > 0 then
         throw ''
           Cannot create machines out of (${lib.concatStringsSep ", " invalidNodeNames})!
-          All machines are references as perl variables in the testing framework which will break the
-          script when special characters are allowed.
+          All machines are referenced as perl variables in the testing framework which will break the
+          script when special characters are used.
 
           Please stick to alphanumeric chars and underscores as separation.
         ''