message: fix static_assertion incantation
diff: @@ -83,11 +83,7 @@ assert_cfg!(
  any(
  all(feature = "native-tls", feature = "client"),
  all(feature = "rustls-tls", feature = "client"),
  - all(not(
  - feature = "rustls-tls",
  - feature = "native-tls",
  - feature = "client"
  - )),
  + all(not(feature = "rustls-tls"), not(feature = "native-tls"), not(feature = "client")),
  ),
  "When using a tls stack, you must use the client feature"
  );
  